The Book of Allah and the Particular Expression (Khass)

1. Beginning the study of the Book

The introduction identified four legal proofs: the Book, Sunnah, consensus and analogy. The first main discussion now turns to the Book of Allah—the Qur’an, not books in general.

Legal methodology does more than recall individual Qur’anic commands. It studies how the wording of revelation communicates meanings and how those meanings bear on legal rulings. This is why the source first defines the Qur’an, then organizes the ways words convey meaning.

2. The textbook definition of the Book

الكتاب: هو القرآن المنزل على رسول الله ﷺ، المكتوب في المصاحف، المنقول عنه نقلاً متواتراً بلا شبهة فيه.
The Book is the Qur’an revealed to the Messenger of Allah ﷺ, written in the codices, and transmitted from him through uninterrupted mass transmission free of doubt.

The definition identifies three features together: revelation, preservation in written codices, and mass transmission (tawatur). These describe the particular revealed text whose legal implications Usul al-Fiqh examines.

3. The significance of “revealed”

The expression al-munazzal ‘ala Rasul Allah ﷺ identifies the Qur’an as revelation given to the Messenger ﷺ. It is not merely the personal authorship or scholarly opinion of an individual.

A scholar may write an explanation of a verse, and that explanation may be useful. Yet a commentary is not itself the revealed Qur’anic text. Distinguishing revelation from human explanation of revelation is essential when evaluating the authority of legal evidence.

4. Written in the codices

Al-maktub fi al-masahif means “written in the codices.” A mushaf is a written collection of the Qur’anic text, and masahif is its plural.

The Qur’an is recited and memorized, and its text is also preserved in writing. The definition points to an identifiable, preserved revealed text. It does not limit the Qur’an to one particular printed physical volume.

5. Understanding mass transmission

The expression al-manqul ‘anhu naqlan mutawatiran describes transmission through many independent transmitters in successive stages, in circumstances that rule out their collective agreement upon a fabrication in the ordinary course of events.

This differs from relying merely on one individual’s report. The definition emphasizes a firmly established public transmission of the Qur’anic text from the Messenger ﷺ.

6. Why the definition says “without doubt”

The closing expression bila shubhatin fihi emphasizes that this transmission establishes the Qur’anic text without a legitimate doubt about its status as revelation.

A separate question concerns the legal meaning of a particular passage. Certainty about a text’s establishment and the interpretation of its legal significance are different inquiries. Firm transmission does not by itself settle every possible difference over meaning.

7. Textual authority versus interpretation

Suppose a Qur’anic verse has been reliably identified. One question asks whether it is part of the Qur’an. A further question asks what its wording establishes about a particular legal issue.

Question 1: Is this the Qur’anic text?
Question 2: What does the text mean, and what ruling can be derived?

The coming discussions of particular, general, shared and interpreted expressions primarily concern the second kind of inquiry: signification.

8. Four approaches to classifying words

وأجرى الأصوليون في كتاب الله تعالى وكذا في سنة رسول الله ﷺ أربع تقسيمات، يحصل منها عشرون قسماً.
Usul scholars apply four schemes of classification to the wording of the Book and also to the Sunnah; these yield twenty classes in all.

“Four classifications” does not mean simply four individual words. They are different lenses for considering expressions: for instance, what meaning an expression was assigned and how clearly a meaning is indicated. This lesson starts with the first scheme.

9. The first classification: assignment of meaning

التقسيم الأول باعتبار الوضع.
The first classification considers the assignment of an expression to its meaning.

Wad‘ refers to a word being established or assigned for a meaning within the language. A speaker recognizes the customary relation between the expression and what it signifies. This first classification asks what kind of meaning-assignment lies behind the expression.

10. Assignment and use are not identical

A word’s established assignment to a meaning is one question; the way a speaker uses it in a particular sentence is another. Context may affect how an expression is understood in use.

The source’s marginal explanation indicates that this first classification does not primarily ask whether an expression is being used literally or figuratively, or whether its meaning is plain or obscure. Its first focus is the underlying assignment of wording to meaning.

11. Four categories of assigned meaning

اللفظ باعتبار وضعه للمعنى على أربعة أقسام: الخاص والعام والمشترك والمؤول.
With respect to its assignment to meaning, a word falls into four classes: particular, general, shared and interpreted.

Khass: assigned to one determinate meaning.
‘Amm: includes multiple members within its scope.
Mushtarak: assigned to distinct meanings.
Mu’awwal: selects one of possible shared meanings through interpretive evidence.

We examine khass here; the other three have their own sections later.

12. The original definition of khass

الخاص: لفظ وضع لمعنى معلوم أو لمسمى معلوم على الانفراد.
A khass is an expression assigned individually to a known meaning or a known referent.

Two details matter: a determinate signification and assignment to that signification distinctly. “Particular” here does not mean that the word can only be someone’s personal name. The book expressly includes an individual, a type and a genus as examples.

13. Particular meaning does not mean one individual

It is misleading to treat khass as meaning “a term that can refer to only one existing person.” Zayd may designate a definite person, whereas rajul names a type and insan a genus in the book’s examples.

A determinate lexical meaning can apply to more than one real individual. That fact alone does not convert it into a general expression in the methodological sense. Determinacy of meaning differs from the inclusion of every member in an asserted ruling.

14. A particular expression for an individual

سواء كان ذلك المعنى شخصاً كزيد.
Whether the meaning denotes an individual, such as Zayd.

Zayd is a personal name; used as the name of a particular man, it identifies him rather than all human beings.

This is the simplest kind of determinate assignment. But it is not the only kind of khass. The textbook next offers expressions referring to a type and a genus: their extension is wider while their designated meanings remain determinate.

15. A particular expression for a type

أو نوعاً كرجل.
Or for a type, such as rajul (“man”).

Rajul does not name one unique individual. It has a definite type-meaning that may be instantiated by many people.

The crucial distinction is between a word’s determinate type-meaning and wording that extends a rule collectively across members. General terms will be examined separately under the book’s definition of ‘amm.

16. A particular expression for a genus

أو جنساً كإنسان.
Or for a genus, such as insan (“human”).

Insan signifies the human genus. Its conceptual range is broader than a particular individual such as Zayd and a narrower type such as rajul, yet its basic lexical signification is determined.

The example shows why the book classifies khass according to assignment of meaning, not by simply counting the real-world things to which an expression might be applied.

17. Comparing individual, type and genus

Place the book’s three examples alongside one another:
Zayd — a specific individual.
Rajul — a determinate type (“man”).
Insan — a determinate genus (“human”).

Their ranges of application differ, but each has a known assigned signification. An explanation of khass limited to “one individual only” would fail to account for the source’s type and genus examples.

18. The Qur’anic example of three quruʾ

﴿وَالْمُطَلَّقَاتُ يَتَرَبَّصْنَ بِأَنْفُسِهِنَّ ثَلَاثَةَ قُرُوءٍ﴾
Divorced women shall wait concerning themselves for three quruʾ. (Al-Baqarah 2:228)

The textbook uses this verse to illustrate khass. Thalathah (“three”) denotes the determinate number three—not two, four, or an unspecified quantity.

The central point here is the definiteness of the number. The precise interpretation of quruʾ and its legal implications form another question.

19. Why thalathah is khass

«ثلاثة» اسم خاص وضع لعدد معلوم.
“Thalathah” is a particular expression assigned to a definite number.

Thalathah means “three”; it cannot simply be read as an indeterminate or variable number. In thalathatu ayyam (“three days”), the number remains three, although additional conditions governing the days may be established elsewhere.

The methodological lesson concerns the precise numerical signification of a particular expression.

20. Distinguishing the number from quruʾ

In applying the verse, the textbook takes quruʾ to mean menstrual periods and states that a divorce during a state of purity leads to a waiting period of three complete menstrual periods. That is the legal interpretation presented in the source.

Two questions must be kept distinct:
How many? The word thalathah gives the determinate number.
What does quruʾ mean? Whether it refers to menstrual periods or periods of purity is a recognized lexical and juristic disagreement.

Certainty about the numerical word does not by itself eliminate every interpretive dispute in the passage.

21. The ruling of khass: determinate indication

حكمه: الخاص دليل قطعي، يجب العمل به؛ لأنه يتناول مدلوله قطعاً.
Its ruling is that a khass gives determinate evidence and must be acted upon, because it definitely signifies its assigned meaning.

This concerns the definiteness of the particular expression’s signification. Where thalathah denotes three, its numerical meaning is clear. A word assigned to several distinct meanings, by contrast, may require further evidence to identify which meaning is intended.

22. Avoiding overstatement about certainty

A khass having determinate signification does not mean that every question in an entire legal case is instantly settled without regard to other verses, reports, conditions, exceptions or context.

A word may definitely say “three”, while the questions “three of what?” and “under what conditions?” still require interpretation of the wider text and applicable evidence. Methodological precision keeps each claim of certainty within its proper scope.

23. Further divisions of khass

من أقسام الخاص الأمر والنهي والمطلق والمقيد يأتي بيانها فيما بعد.
Among the further divisions of khass are command, prohibition, unrestricted and restricted expressions; they will be explained later.

Amr concerns commanding, nahy prohibiting, mutlaq unqualified wording, and muqayyad wording constrained by a qualification. Their names and broad distinctions are introduced here; their detailed legal rules are deliberately reserved for their chapters.

24. Worked practice: recognizing khass

Read these four expressions under the source definition:
Zayd — a named individual.
Rajul — a known type-meaning.
Insan — a known genus-meaning.
Thalathah — the fixed number three.

The common feature is a determinate assigned signification. Identifying a khass involves more than recognizing the label: explain what designated meaning the word conveys. The numeral example displays that property especially clearly.

25. Review and the next topic

This lesson began with the definition of the Book of Allah: the Qur’an revealed to the Messenger ﷺ, preserved in written codices, and transmitted through tawatur. The first of four general classifications then considered words with regard to their assigned meaning.

Its four categories are khass, ‘amm, mushtarak and mu’awwal. Khass signifies its determinate assigned meaning; Zayd, rajul, insan and thalathah illustrate different kinds of such signification.

The next lesson studies ‘amm, general expressions and how their scope differs from that of khass.