The Book of Transactions (Kitab Al-Buyu`)

Muslim :: Book 10 : Hadith 3795

Abdullah b. Abu Qatida reported that Abu Qatada (Allah be pleased with him) demanded (the payment of his debt) from his debtor but he disappeared; later on he found him and he said: I am hard up financially, whereupon he said: (Do you state it) by God? He said: By God. Upon this he (Qatada) said: I heard Allah's Messenger (may peace be upon him) as saying: He who loves that Allah saves him from the torments of the Day of Resurrection should give respite to the insolvent or remit (his debt) This hadith has been narrated on the authority of Ayyob with the same chain of transmitters.

Source materials are from the University of Southern California MSA site
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