Sayyiduna Samurah bin Jundub (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) led us in one of the prayers, then said: "Is anyone from such-and-such tribe present here? Your companion has been held back from Paradise because of a debt he owed. Now either you ransom him from the punishment of Allah, or you hand him over (to the punishment)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6721