the Messenger of Allah forbade selling animals in exchange for animal's ion credit.
Sunan an-Nasa'i Book 44, Hadith 172
← Previous Hadith
"I lent a young camel to the Messenger of Allah, and I came to ask him to repay me. He said: 'Yes, I will only repay you with a superior she-camel.' so he repaid me and repaid me well. Then a Bedouin came to him to ask to repay him a camel of a certain age, and the Messenger of Allah said: 'Give him a camel of certain age.' On that day they gave him a mature camel and he said: 'This is better than my camel.' He (The Prophet) Said:' The best of you is the one who is best in repaying.'''
Sunan an-Nasa'i Book 44, Hadith 171 Next Hadith → "A slave came and gave his pledge to the Messenger of Allah to emigrate, and the Prophet did not realize that he was a slave. Then his master came looking for him. The Prophet said; 'Sell him to me.' So he bought him for two black slaves, then he did not accept until he had asked; 'Is he a slave?'''
Sunan an-Nasa'i Book 44, Hadith 173
Sunan an-Nasa'i Book 44, Hadith 171 Next Hadith → "A slave came and gave his pledge to the Messenger of Allah to emigrate, and the Prophet did not realize that he was a slave. Then his master came looking for him. The Prophet said; 'Sell him to me.' So he bought him for two black slaves, then he did not accept until he had asked; 'Is he a slave?'''
Sunan an-Nasa'i Book 44, Hadith 173