Volume 3, Book 47, Number 780:
Narrated Abu Huraira:
The Prophet took a camel of special age from somebody on credit. Its owner came and demanded
it back (harshly). The Prophet said, “No doubt, he who has a right, can demand it.” Then the Prophet
gave him an older camel than his camel and said, “The best amongst you is he who repays his debts
in the most handsome way.”