Musannaf Ibn Abi Shaybah

Hazrat Saeed bin Jubair (may Allah have mercy on him), Hazrat Hammad, and Hazrat Ikrimah (may Allah have mercy on him) did not consider there to be any harm in doing so.

Hazrat Tawus says that when the real right is religion (i.e., the period is fixed), then take back exactly what you gave; and if it is a loan (the period is not fixed), then there is no harm in taking something of a different kind in return for the loan given.

Ibrahim (may Allah have mercy on him) says that if a man owes someone some dirhams, and the creditor comes to him to demand repayment, and the debtor says, "Take instead of it wheat, dates, or anything other than gold," then there is no harm in that. When his dirhams are owed by another, he may take from him whatever he wishes in exchange.

Hazrat Ibn Harmalah (may Allah have mercy on him) says that I sold a she-camel on the condition that I would receive dirhams in exchange on the day of harvest. When the time for delivery came, wheat, barley, and wheat were decided for me instead. So I asked Hazrat Saeed bin Al-Musayyib (may Allah have mercy on him) about it. He (may Allah have mercy on him) said: This is not correct; do not accept anything except dirhams.

Hazrat Jabir (may Allah be pleased with him) narrates that if a man has a debt upon another, there is no harm if he takes a cheap slave from him (in exchange for the debt).