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May a fasting vow be fulfilled by moving to a better pattern of fasting?

2026-10-14

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T198 · Ibn Taymiyyah

Shaykh al-Islām Ibn Taymiyyah

شيخ الإسلام أحمد بن تيمية

Original Q&A · Complete source question and answer

Complete original question and answer, 25/289–290.

النص العربي

السؤال الأصلي

وسئل عن رجل نذر أنه يصوم الاثنين والخميس، ثم بدا له أن يصوم يوما، ويفطر يوما، ولم يرتب ذلك إلا بأن يصوم أربعة أيام، ويفطر ثلاثة أو يفطر أربعة، ويصوم ثلاثة، فأيهما أفضل؟ أفتونا يرحمكم الله ؟

الجواب

الحمد لله، إذا انتقل من صوم الاثنين والخميس إلى صوم يوم وفطر يوم، فقد انتقل إلى ما هو أفضل، وفيه نزاع، والأظهر أن ذلك جائز، كما لو نذر الصلاة في المسجد المفضول، وصلى في الأفضل، مثل أن ينذر الصلاة في المسجد الأقصى، فيصلي في مسجد أحد الحرمين. والله أعلم.

English translation

English translation prepared for SalafAlSalih.com from the cited Arabic source. It is not an official translation.

Original question

He was asked about a man who vowed to fast Mondays and Thursdays, then wished to fast one day and not fast the next. He could arrange this only by fasting four days and not fasting three, or not fasting four and fasting three. Which is better? Please give us a ruling; may Allah have mercy on you.

Answer

Praise be to Allah. If he moves from fasting Mondays and Thursdays to fasting one day and not fasting the next, he has moved to something better. There is disagreement about this, but the stronger view is that it is permissible, just as if someone vowed to pray in a less excellent mosque and prayed in a more excellent one—for example, if he vowed to pray in al-Masjid al-Aqṣā and prayed in the mosque of one of the two Sacred Sanctuaries. Allah knows best.

Source and editorial notes

Majmūʿ al-Fatāwā 25/289–290

مجموع الفتاوى

Majmūʿ al-Fatāwā

Arabic checked against the cited source and adjacent question boundaries. Diacritics and display marks omitted; honorific glyphs expanded. Titles and scope notes are editorial.

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