From Sahih Bukhari (Hadith 2392):
Narrated Abu Huraira:A man came to the Prophet (ﷺ) and demanded a camel (the Prophet (ﷺ) owed him). Allah's Messenger (ﷺ) told his companions to give him (a camel). They said, "We do not find except an older camel (than what he demands). (The Prophet (ﷺ) ordered them to give him that camel). The man said, "You have paid me in full and may Allah also pay you in full." Allah's Messenger (ﷺ) said, "Give him, for the best amongst the people is he who repays his debts in the most handsome manner
Reference: Bukhari 2392