Amr bin al-Shryd عمرو بن الشريد · The Book of Financial Transactions

the Messenger of Allah ruled that if a man found (his goods) in the possession of a man who was not guilty, then if he wished he could give the man what he had paid for it, or if he wished he could go after the one who had stolen it. Abu Bakr and 'Umar passed similar judgments.

there was the governor of Al-Yamamah, and Marwan wrote to him saying that Mu'awiyah had written to him, saying that any man who had something stolen from him had more right to it wherever he found it. Then Marwan wrote saying that to me (Usaid). I wrote to Marwan saying that the Prophet had ruled that if the one who bought it from the one who stole it is ot guilty of anything (and did not realize that it was…

"Your companion owes a debt. " Abu Qutdah said: "I will guarantee it for him. "The prophet said: "In full?" He said: "In full." (Sahah)

"The best of you is the one who is best in repaying."