Sunday, 19 April 2026 (2 Dhuʻl-Qiʻdah 1447 AH)
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[The ruling on the grammatically faulty (misdeclined) oath]

Fatwa No: 23721
Date: 2026/04/19
Answered by: System Fatwa Committee
Views: 0

Question: If a person says, “By Allah, I will indeed do (it)” (wa-llāhi la-afʿalu, with the verb in the nominative), intending thereby to remove it from being an oath, then what is the ruling of this grammatically faulty oath?

Answer – and Allah is the One who grants success:
1. According to the madhhab, no expiation is required from one who swears in this manner, and that is when he intends the grammatical fault in order to be safe from the consequences of the oath.
2. But if he is ignorant of the rules of inflection (iʿrāb), then expiation is binding on him.
3. Unless the oath concerns the right of another, in which case the grammatically faulty oath does in fact take effect.

Thus it is (stated) in the marginal notes on Sharḥ al-Azhār ascribed to the madhhab, except in the last issue indicated by the number three, for that is not the (actual) position of the madhhab. For in al-Kawākib it is stated that the oath is to be repeated to him, properly inflected. End of quote from the marginal notes, and this is the madhhab.

Source: Min Thimār al-ʿIlm wa al-Ḥikmah vol.2