Virtues and Merits of the Prophet (pbuh) and his Companions

Bukhari :: Book 4 :: Volume 56 :: Hadith 687

Narrated Abu Huraira:

Allah's Apostle said, "A man used to give loans to the people and used to say to his servant, 'If the debtor is poor, forgive him, so that Allah may forgive us.' So when he met Allah (after his death), Allah forgave him."