Saad bin Ubada asked the Messenger of Allah ﷺ for a ruling concerning a vow his mother had made which she had not fulfilled before she died. The Prophet ﷺ said, "Fulfill it on her behalf."
حدثنا قتيبة حدثنا الليث عن ابن شهاب عن عبيد الله بن عبد الله بن عتبة
أن سعد بن عبادة استفتى رسول الله ﷺ في نذر كان على أمه توفيت قبل أن تقضيه فقال النبي ﷺ اقض عنها
Agreed upon [by Bukhari and Muslim]. Bukhari transmitted it in the book of Legal Stratagems, chapter "On zakat, and that what is combined should not be separated, nor what is separate combined, out of fear of the charity due," hadith no. 6959, and Muslim, hadith no. 1638, from Qutayba, with this wording, and no...