Sahih Muslim
The Book of Transactions (Kitab Al-Buyu)
Book Number: 010 / Hadith Number: 3771
Jabir b. Abdullah (Allah be pleased with them) reported Allah's Messenger (may peace be upon him) saying: If You sell fruits to your brother (and Jabir b. Ahduthh reported through another chain of narrators: If you were to sell fruits to your brother) and these is a stricken with Calamity, it is not permissible for you to get anything from him. Why do you get the wealth of your brother, without jutification?