Narrated Abdallah bin Umar: Umar bin Al Khattab gave a horse as alms in the way of Allah. He then found it being sold, and intended to buy it. So he asked the Messenger of Allah ﷺ about this. He said Do not buy it, and do not take back your sadaqah.
Hadith Referenceسنن ابي داود / كتاب الزكاة / 1593
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (2636) صحيح مسلم (1620)