Sahih Bukhari Volume 003, Book 041, Hadith Number 575.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 41. Loans, Payment of Loans, Freezing of Property, Bankruptcy.
Narated By Abu Huraira : A man demanded his debts from Allah's Apostle in such a rude manner that the companions of the Prophet intended to harm him, but the Prophet said, "Leave him, no doubt, for he (the creditor) has the right to demand it (harshly). Buy a camel and give it to him." They said, "The camel that is available is older than the camel he demands. "The Prophet said, "Buy it and give it to him, for the best among you are those who repay their debts handsomely."