(10) باب الرَّجُلِ يَبْتَاعُ صَدَقَتَهُ
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.
Reference: Sunan Abi Dawud 1593
In-book reference: Book 9, Hadith 38
English translation: Book 9, Hadith 1589