Excused Amounts of Impurity and Transfer of Impurity

Read the bilingual lesson for Excused Amounts of Impurity and Transfer of Impurity and test your understanding with a focused quiz.

Lesson

1. Heavy Impurity: The Dirham Limit

وَعُفِيَ قَدْرُ الدِّرْهَمِ مِنَ الْغَلِيظَةِ

A dirham amount of heavy impurity is excused for prayer validity; more than that is not excused when removal is possible. The commentary measures solid impurity by the classical dirham weight and liquid impurity by a classical dirham-area description. This lesson does not force an exact modern gram or centimetre conversion.

2. Light Impurity: Less Than One Quarter

وَمَا دُونَ رُبْعِ الثَّوْبِ أَوِ الْبَدَنِ مِنَ الْخَفِيفَةِ

The matn states that light impurity is excused when it is less than one quarter of the garment or body under consideration. Detailed quarter-calculation has more than one juristic explanation, so the beginner lesson keeps the matn wording rather than imposing a universal modern sleeve formula.

3. Very Fine Urine Spray

وَعُفِيَ رَشَاشُ بَوْلٍ كَرُؤُوسِ الْإِبَرِ

Urine spray as fine as needle-heads is excused because avoiding such minute spray is extremely difficult. This does not create a general exemption for ordinary visible drops.

4. Wet Impure Ground or Bedding: Look for the Trace

وَلَوِ ابْتَلَّ فِرَاشٌ أَوْ تُرَابٌ نَجِسَانِ مِنْ عَرَقِ نَائِمٍ أَوْ بَلَلِ قَدَمٍ وَظَهَرَ أَثَرُ النَّجَاسَةِ فِي الْبَدَنِ وَالْقَدَمِ تَنَجَّسَا وَإِلَّا فَلَا

If impure bedding or soil becomes wet from sweat or a wet foot, the body/foot is ruled impure when a recognizable trace of the impurity actually transfers. If no trace appears, damp contact alone does not automatically make it impure.

5. The Theme Is Actual Transfer

The commentary likewise treats damp-cloth contact and wind-carried impurity by whether the impurity itself actually transfers and leaves a trace. Mere proximity or light dampness is not enough by itself.

Practice questions

Question 1

How does the commentary describe the excused amount of liquid heavy impurity?

By an exact modern diameter of 3 cm.
By the classical dirham-area description, commonly expressed through the hollow of the palm.
By one quarter of the garment.
By exactly three drops.

Question 2

What is the excused limit for a Light Impurity (like cow or goat urine) on a garment or body limb?

Up to the size of a dirham coin.
Less than one-quarter (1/4th) of the affected garment or the affected limb.
Up to half of the garment.
Only up to 3 drops.

Question 3

Extremely fine sprays of urine that are no larger than the heads of needles are completely excused if they get on clothes or the body.

Question 4

Match the impurity scenarios on garments with their exact excused legal limits:

Question 5

If a wet pure foot touches impure soil but no recognizable trace of the impurity transfers, what does the stated rule say?

The foot is automatically impure.
The foot is not ruled impure merely from the contact when no trace appears.
The foot becomes permanently impure.
The ruling depends only on the time of day.

Question 6

If dry dust from a road known to have animal droppings lands on a person's clothes, the clothes immediately become impure and invalid for prayer.

Question 7

Classify the following scenarios into "Valid for Prayer (Excused)" and "Invalid for Prayer (Not Excused)":

Question 8

If light impurity covers one-fifth of the relevant garment under the basic matn rule taught here, is it within the excused amount?

No, any light impurity invalidates prayer.
Yes, because one-fifth is less than one-quarter.
Only if it weighs one dirham.
Only during travel.

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