(100) باب شِرَاءِ الصَّدَقَةِ
It was narrated from Salim bin 'Abdullah that 'Abdullah bin 'Umar used to narrate that:
'Umar give a house in charity for the sake of Allah, the Mighty and Sublime, and he found it being offered for sale after that. He wanted to buy it, then he went to the Messenger of Allah and asked him about that. The Messenger of Allah said: "Do not take back what you have given in charity."
Reference: Sunan an-Nasa'i 2617
In-book reference: Book 23, Hadith 0
English translation: Vol. 3, Book 23, Hadith 2618