Abu Hurairah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings of Allah be upon him) borrowed a young camel and repaid it with a better camel, and said: "The best among you are those who are best in repaying debts."

Imam Tirmidhi says:
1- The hadith of Abu Hurairah (may Allah be pleased with him) is Hasan Sahih.
2- Shu’bah and Sufyan have also narrated it from Salamah.
3- In this chapter, there is also a narration from Abu Rafi’ (may Allah be pleased with him).
4- Some people of knowledge act upon this; they do not consider it disliked to borrow a camel of any age.
5- And some people have considered it disliked.