"Go and buy a young camel for him." He came and said: "I could only get a Raba camel of good quality." He said: "Give it to him, for the best of the Muslims is the one who is best in repaying."
Sunan an-Nasa'i Book 44, Hadith 169
← Previous Hadith "I heard Ibn 'Abbas say: 'When the Prophet came (to al-Madinah), they used to pay in advance for dates, two or three years in advance. He forbade them that and said: 'whoever pays in advance for dates, let him pay for a known amount or a known weight, to be delivered at a known time'''

Sunan an-Nasa'i Book 44, Hadith 168 Next Hadith → "A man had lent a camel of a certain age to the Prophet and he came to get it back. He said: "Give it to him" But they could only find a camel that was older than it. He said: "Give it to him." He said: "You have repaid me well," The Messenger of Allah said; "The best of you is the one who is best in repaying"

Sunan an-Nasa'i Book 44, Hadith 170