In the name of Allah, Most Gracious, Most Merciful.
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (May Allah exalt his mention and protect him from imperfection) said: “There was a person who used to loan money to the people and he used to say to his servant: “When an insolvent person comes to you, show him leniency so that Allah may forbear our faults.” So when he met Allah (i.e., when he died), Allah forgave him.” (Al-Bukhari and Muslim)
Riyaadiss-Saliheen (The Meadows of the Righteous)
By Imam An Nawawi
Chapter 240, Page 393, No 1370