Discharging an obligation through its object or a substitute, remedying deficiency, equivalent goods, value, and legal applications Read the bilingual lesson for Performance and Substitution: Complete and Deficient Adāʾ and Qaḍāʾ and test your understanding with a focused quiz.
Lesson
1. From command to performance and substitution
الواجب بحكم الأمر نوعان: ١- أداء ٢- قضاء
An obligation resulting from a command is considered under two heads: adāʾ and qaḍāʾ.
When a religious or financial obligation exists, the first question is whether the obligated person provides the very act or object due, or a legally recognized substitute. This yields the distinction between adāʾ (performance) and qaḍāʾ (substitutive fulfillment).
Qaḍāʾ is not confined in this discussion to a prayer offered after its appointed time. Property, usurped goods, their equivalents, and their monetary values also illuminate the distinction.
2. The definition of adāʾ
فالأداء: عبارة عن تسليم عين الواجب إلى مستحقه
Adāʾ means delivering the very object of the obligation to the one entitled to it.
ʿAyn al-wājib is the very act or item initially due. A prayer obligation is fulfilled by prayer; a duty to restore a particular owned object is, in principle, fulfilled by returning that object.
The entitled party may be considered in worship as the party whose command is fulfilled, or in property matters as the rightful owner. Proper delivery of the required act or object is the route to discharge.
3. The definition of qaḍāʾ
والقضاء عبارة عن تسليم مثل الواجب إلى مستحقه
Qaḍāʾ means delivering an equivalent of the obligation to its rightful recipient.
The key expression is mithl al-wājib, a legally recognized equivalent of what was initially due. If the original act or object cannot be supplied, the law may direct the debtor or wrongdoer to a substitute.
For instance, if fungible property taken without right is destroyed, replacement by its equivalent becomes relevant. With nonfungible property, value may be due. Whether this substitute counts as complete or deficient qaḍāʾ is a distinct question.
4. Two forms of performance
ثم الأداء نوعان: ١- كامل ٢- قاصر
Performance is of two kinds: complete and deficient.
Complete adāʾ supplies the very obligation with its required qualities and attendant rights. Deficient adāʾ supplies the original act or object but with a shortcoming in a required characteristic.
This is not a mere binary between valid and invalid acts. Some deficiencies may be remedied by an additional duty; other defects have different consequences. One must identify the particular missing quality.
5. Complete performance in worship and property
فالكامل: مثل أداء الصلاة في وقتها بالجماعة، أو الطواف متوضئًا
Complete performance is illustrated by prayer at its time with the congregation, or circumambulation while in a state of ritual purity.
Prayer is examined with regard to its required pillars and conditions, while congregation supplies a dimension of completion or excellence that should not automatically be equated with basic validity.
In property, delivery of the exact sold item as owed to the purchaser or complete restoration of a right illustrates fulfillment without the relevant shortcoming. The label complete must be read in its particular legal context.
6. Legal effect of complete adāʾ
وحكم هذا النوع: أن يحكم بالخروج عن العهدة به
The legal effect is that the person is judged discharged from that obligation.
Khurūj ʿan al-ʿuhdah is release from the particular liability. Once the due right is properly discharged, it cannot be demanded a second time as the same duty. A new obligation arising from another cause is a separate matter.
For example, a valid repayment of the entire debt removes the corresponding debt. Likewise, valid performance of a specified obligatory prayer discharges that obligation for its time.
7. Returning usurped property
In complete performance of a property duty, the original owner's entitlement to the usurped item is central. Proper restoration of that same item fulfills the original obligation.
If the wrongdoer attempts to sell, pledge, or gift it, one must examine the effect of each disposition on ownership and liability. Merely changing the description of a transaction does not automatically extinguish the owner's underlying right.
Principle: Where restoration of the original item remains possible and required, begin with that duty rather than treating an unauthorized alternate dealing as ordinary restoration.
8. Defective sale and imperfect discharge
In a defective sale (bayʿ fāsid), the transaction is recognized in its basic kind but contains a prohibited feature or condition. Possession and later dealings with the acquired item must be assessed under the relevant rules.
Delivering some property may satisfy an aspect of liability without meeting every condition associated with a sound sale and its attendant rights.
Distinction: Acquiring legal title, delivering an obligation in full, and being released from all consequences of a transaction are three different questions. They must not be collapsed into one.
9. Definition of deficient performance
وأما الأداء القاصر: فهو تسليم عين الواجب مع النقصان في صفته
Deficient adāʾ is delivery of the original obligation while one of its qualities is deficient.
The original act or object has not been replaced: the shortcoming lies in a required quality. Hence this remains a form of adāʾ rather than qaḍāʾ.
Example 1: Prayer's basic acts are performed, but required composure in the postures is omitted.
Example 2: Circumambulation occurs with a relevant shortcoming concerning ritual purity.
Example 3: Property is returned but its legally significant quality or associated right has been impaired.
10. Composure in prayer
Taʿdīl al-arkān denotes the required composure and steadiness in prayer's bowing, prostration, and related postures. The disagreement asks whether omission compromises a necessary quality or the essential completion of the pillar itself.
In the positions attributed to Abū Ḥanīfah and Muḥammad, the original act of prayer is discussed with a possible remedy for the shortcoming. Abū Yūsuf and al-Shāfiʿī assess this deficiency more strictly.
Usūl point: The same external omission may be classified either as a defective attribute or as failure to fulfill a pillar, producing different rulings on validity and repetition.
11. Purity in circumambulation and compensation
The issue of purity during ṭawāf differentiates the essential circumambulation from its requisite state of purity. In the Hanafi analysis, the core act may occur while performing it without ablution or in major ritual impurity produces deficiency and a compensatory ruling.
Depending on the kind of deficiency, repeating the act or offering a sacrifice becomes relevant. It is inadequate to compress every case into one unqualified verdict of valid or invalid.
Comparison: Purity in prayer and purity in ṭawāf do not occupy identical legal positions in this discussion. The difference concerns the underlying act and its required attributes.
12. Deficient performance in debts and usurpation
In financial obligations, deficient performance arises when the original object is returned but its legal position is still impaired by another liability or claim. A usurped item, for example, may have become encumbered by a debt or a liability generated during the usurpation.
The question is whether the owner merely received the physical item or received it free of the legally relevant impairment. If some of the owner's rights remain unsatisfied, full discharge cannot simply be inferred from the physical handover.
Principle: A change in possession does not invariably establish complete legal performance; associated rights must also be considered.
13. Paying a debt with debased currency
Zayf refers to debased or substandard currency compared with the sound coins owed. If a debt requires sound dirhams and inferior dirhams are handed over, the outward count may be correct while the required quality is deficient.
Whether the recipient knew of the defect, accepted the coins, or later discovered it may affect the remedy. Equal numerical amounts do not automatically constitute complete performance when the quality legally due differs.
Application: A debt of 100 sound dirhams cannot be assessed solely by the number 100 if the coins actually tendered are zayf.
14. Two outcomes for a deficient act
وحكم هذا النوع: أنه إن أمكن جبر النقصان بالمثل انجبر به وإلا يسقط حكم النقصان إلا في الإثم
If a deficiency can be remedied by a recognized equivalent, it is remedied; if not, the legal consequence of that deficiency may fall away, while culpability remains.
In the first situation the law provides a remedy, such as prostrations for forgetfulness for certain omissions, or a prescribed compensation for a deficient circumambulation. In the second, no equivalent remedy has been recognized for that shortcoming. This does not make deliberate neglect permissible.
Each example must be assessed according to its own source, category, and legal reasoning.
15. Prostration for forgetfulness as a remedy
For certain omissions made through forgetfulness, sujūd al-sahw is legislated. The underlying prayer has been performed, but a specified deficiency is remedied by an additional prescribed act. This is compensation for a shortcoming rather than a new performance of the entire prayer.
Leaving an essential pillar such as bowing or prostration cannot automatically be repaired merely by adding the prostrations for forgetfulness. Essential pillars and compensable duties remain distinct.
Diagnostic question: Is the original act absent, or has it occurred with a shortcoming in a required component?
16. Where no equivalent remedy exists
Some deficiencies have no legally assigned equivalent. The discussion refers to takbīrs of the Days of Tashrīq and particular acts related to prayer to show that a duty can be tied to its designated occasion or quality.
A takbīr omitted in its specified context does not necessarily produce the identical legal effect if recited at an arbitrary later time. Likewise, a sunnah element of prayer does not automatically generate an obligatory substitute merely because it was missed.
Rule: A remedy cannot be invented from resemblance alone. Its legal recognition must be established.
17. Encumbered usurped property
A classical example concerning an enslaved person taken without right, and liability arising from an offense committed during that period, illustrates a central distinction: returning an object physically does not necessarily restore it free from every legal claim.
If the owner's property is returned while a third party has acquired an attached claim, performance and financial liability may have to be assessed separately. Different outcomes depend on whether that attached claim persists or has been extinguished.
Original ownership, the attached claim of a third party, and the possible remedy are separate legal considerations. Liability depends on which rights have actually been restored and which remain outstanding.
18. Priority of original performance
ثم الأصل في هذا الباب: هو الأداء كاملًا كان أو ناقصًا، وإنما يصار إلى القضاء عند تعذر الأداء
The starting point is original performance, whether complete or deficient. Resort to qaḍāʾ occurs when original performance becomes impossible.
Before changing to a substitute, one must establish whether the original item or action still exists and can be delivered. If the original property remains available, its owner cannot ordinarily be compelled to accept merely an estimated price instead, absent a separate lawful ground.
Example: A specific item held as a deposit should first be returned, rather than replaced at the holder's preference by a cash valuation.
19. Specific property and debts of a kind
ولهذا يتعين المال في الوديعة، والوكالة، والغصب
Thus the particular property is identified in deposit, agency, and usurpation.
A deposit concerns the very deposited item, agency may concern a specified item owned by the principal, and usurpation concerns the owner's same property. By contrast, a general debt may call for an amount and kind of property rather than the very coins initially mentioned.
Comparison: A ring held in deposit is not the same as a generic debt of 100 dirhams: the first centers on a specific object, while the second centers on meeting its defined amount and quality.
20. Alteration of an item and the owner's claim
When usurped property is transformed, the legal inquiry concerns whether the change has altered the object's identity, dominant utility, or customary designation.
Example 1: Fabric is cut and worked into something else.
Example 2: Timber is transformed into a door or board.
Example 3: Cultivation changes the condition of land.
The jurists examine whether the original property remains returnable or the transformation justifies another consequence, such as payment of value. Original performance remains the starting point; not every physical change automatically permits substitution.
21. The two kinds of qaḍāʾ
وأما القضاء فنوعان: ١- كامل ٢- قاصر
Qaḍāʾ also has two forms: complete and deficient.
Complete qaḍāʾ supplies a substitute equivalent in its legally relevant form and meaning. Deficient qaḍāʾ supplies a legally accepted substitute that cannot replicate a major aspect of the original thing.
Example: Replacing measured grain with an equal amount of the same recognized quality is an example of complete replacement. Paying a valuation for a distinctive nonfungible animal illustrates the category of deficient substitution.
22. Fungible property and complete replacement
فالكامل منه: تسليم مثل الواجب صورة ومعنى
Complete qaḍāʾ delivers an equivalent corresponding to the obligation in both form and substantive quality.
For fungible goods, an equivalent can be defined by kind, quantity, and established standard. If a specified weight of wheat of a certain grade was destroyed, replacing it with the same weight and grade is the basic example.
A distinctive animal or other nonfungible item may have no substitute matching its individually significant characteristics. Equal numbers alone therefore do not establish complete replacement.
23. Nonfungible property and value
وأما القاصر: فهو ما لا يماثل الواجب صورة ويماثله معنى
Deficient qaḍāʾ is a substitute that does not reproduce the original form but corresponds to it in a legally significant respect.
For example, a particular goat that has been destroyed cannot usually be duplicated in all its age, health, condition, and other individual features. Its monetary value may stand in as a financial substitute, but it is not another identical goat.
The proper valuation date and conditions can differ across cases. A single unqualified rule about price at all times should not be inferred.
24. Use-benefits and disagreement over compensation
The benefits (manāfiʿ) of property—such as occupying a house or enjoying another's services—are different from the physical property itself. The question is whether time-bound benefits can be restored by an equivalent after they are consumed.
In the classical Hanafi position described here, some claims for uncompensated use-benefits are denied; al-Shāfiʿī recognizes a broader obligation to compensate such benefits through a monetary rental equivalent. The disagreement concerns whether benefits are legally compensable property and how replacement is established.
Conclusion: Compensation for benefits turns on whether the benefit is treated as compensable property and what legally equivalent remedy is available when it has been consumed.
25. Intangible rights and the final distinction
The final subtlety is that not every right has a monetary price that can function as an equivalent. A legally recognized substitute must be shown to replace the relevant right; the mere fact that a benefit was enjoyed is insufficient.
Classical examples concern marital benefits, invalid judicial testimony leading to separation, and certain consequences of wrongful killing. These illustrate that compensability of the underlying right must be established independently. Mahr or ʿuqr may be due for a different legal reason and must not be equated with a universal price for every benefit.
Summary: Adāʾ concerns the original duty and qaḍāʾ its substitute. Each can be complete or deficient. Valid compensation and remedies depend on a recognized legal cause, not superficial resemblance.
Practice questions
Question 1
What essentially defines adāʾ in this discussion?
- Performing anything after its time
- Delivering the very obligation to its recipient
- Giving a price instead of the duty
- Leaving a required attribute of the duty deficient
Question 2
What is central to the definition of qaḍāʾ?
- A recognized equivalent of the original
- Intention alone
- The continued existence of the original
- Returning the very original object
Question 3
Which case involves performance of the original object?
- Paying for a destroyed goat
- Providing another book for a lost one
- Returning the very deposited ring
- Replacing consumed wheat
Question 4
What are the two categories of adāʾ?
- Obligatory and voluntary
- Absolute and restricted
- Literal and figurative
- Complete and deficient
Question 5
What is the primary consequence of complete adāʾ?
- That same right remains due
- Liability for that duty is discharged
- The duty must always be repeated
- Expiation is invariably required
Question 6
How should congregation in the prayer example be understood?
- Every noncongregational prayer is invalid
- Congregation automatically makes the same prayer obligatory again
- Perfection or excellence can differ from basic validity
- Congregation is a validity condition in every school and situation
Question 7
What is the default if the exact usurped property remains returnable?
- Return that very property
- Give anything the wrongdoer prefers
- Offering only an equivalent while the original item remains
- Always substitute money
Question 8
If usurped food has been consumed, what is true about returning the exact original?
- The exact food remains
- No right can remain
- Treating payment of an earlier price as preservation of the original item
- Return of the exact item is impossible; compensation must be assessed
Question 9
What distinguishes deficient adāʾ?
- Always providing an unrelated kind
- The original duty is supplied with a defective attribute
- Handing over an equivalent instead of the original object
- Every required attribute of the original duty being complete
Question 10
What lies at the heart of the debate over composure in prayer?
- Whether lack of composure changes prayer timing
- Whether every omission of composure is merely a voluntary shortcoming
- Whether missing composure affects a pillar or an attribute
- Whether a completed pillar makes its qualities legally irrelevant
Question 11
Why is ritual purity in ṭawāf assessed separately from prayer?
- Every deficient circumambulation is simply a missed prayer
- Every rule is identical
- Purity in circumambulation is always classified as the same essential pillar as in prayer
- The core act and its required attribute can have different legal roles
Question 12
What is the main issue when a debt in sound coins is paid using debased coins?
- Treating the debased payment as return of a specific usurped item
- Treating coin count alone as replacing all required qualities
- Deficiency in the required quality
- Assuming the debt is automatically extinguished by substandard coins
Question 13
What is done if a deficiency in adāʾ has an authorized remedy?
- Apply the prescribed remedy
- Always disregard the defect
- Treating a new substitute as sufficient while the original act remains
- Requiring full repetition for every deficiency without its own basis
Question 14
Sujūd al-sahw exemplifies which form of remedy?
- An automatic substitute for every missing pillar
- A prescribed remedy for certain forgetful omissions
- Treating the prostrations as complete substitution for every missed pillar
- Treating it as an independent replacement for the prayer
Question 15
What is correct about a deficiency with no assigned substitute?
- Invent a substitute from superficial analogy
- Imposing monetary compensation for every omitted attribute
- Treating every unremedied defect as proof that the original act never occurred
- One cannot invent a remedy; culpability may remain
Question 16
Which issue is clarified by distinguishing pillar and attribute?
- Treating every defect as an issue of timing alone
- Assuming a single remedy corrects both pillar and attribute omissions
- Whether a defect affects the act itself or its required quality
- Classifying every act with a missing attribute as complete adāʾ
Question 17
If a third-party legal claim remains attached to returned property, what must be checked?
- Treating the current physical form as conclusively extinguishing all claims
- Whether full rights were restored and liability persists
- Treating physical delivery as invariably resolving connected liability
- Treating third-party claims as invariably irrelevant to the owner
Question 18
What is the default order between original performance and substitution?
- Prefer original performance where possible; substitute on impossibility
- Substitution always precedes performance
- Deficient adāʾ is never adāʾ
- Value always precedes the object
Question 19
Why must the exact deposited ring ordinarily be returned?
- Deposits and debts are identical
- Treating both value and item as unspecified from the start
- The specific item is the subject of the deposit
- Treating every deposit as specified through sale possession
Question 20
Which example primarily concerns kind and amount rather than a specific original object?
- A particular watch in deposit
- One particular usurped book
- A specific ring held in agency
- A generic debt of 100 sound dirhams
Question 21
What is the first question when usurped timber has been turned into a door?
- How the transformation affects identity and possibility of return
- Whether a substitute takes priority without the owner’s authorization
- Whether every physical alteration automatically extinguishes ownership
- Whether payment of value always takes precedence over return
Question 22
What are the two kinds of qaḍāʾ?
- Shared and interpreted
- Complete and deficient
- Literal and figurative
- Command and prohibition
Question 23
In complete qaḍāʾ, in what respects does the substitute correspond?
- Only sameness of category and name
- Equal quantity even when the quality differs
- Form and substantive meaning
- Only matching monetary value despite a different kind
Question 24
Replacing destroyed wheat with wheat of the same kind, grade and quantity illustrates what?
- Complete qaḍāʾ
- Deficient adāʾ
- Deficient qaḍāʾ because the original quantity has changed
- Complete adāʾ because the identical object has returned
Question 25
Why may paying the value of a unique goat count as deficient qaḍāʾ?
- Value restores every characteristic of the animal
- No substitute of any kind is ever possible
- Monetary value is identical to every physical characteristic
- Value substitutes financially but not in the original animal’s form
Question 26
What underlies the classical Hanafi–Shafiʿi disagreement on compensating benefits?
- The debate concerns only when a compensatory payment is made
- Whether benefits are compensable and substitutable
- The debate depends only on the original object’s weight
- Both treat benefits as fungible property in every case
Question 27
Every complete qaḍāʾ necessarily returns the identical original object.
Question 28
In deficient adāʾ, the original duty may be fulfilled while a required attribute remains defective.
Question 29
When a deposited item still exists, paying its price is always the primary required form of discharge.
Question 30
All jurists agree on identical financial compensation for every consumed benefit.
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