Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) owed a man a two-toothed camel as a debt. He came demanding repayment, and he (peace and blessings be upon him) said: "Give it to him." They searched and found one better than it, and he (peace and blessings be upon him) said: "Give it to him." The man said: You have paid me in full; may Allah pay you in full. He (peace and blessings be upon him) said: "The best person among you is the one who repays his debt in a good manner."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10948