Musnad Abi Ya'la 5152 — he related: On the Day of Mihran I overpowered

It is narrated from Abu al-Kanud (may Allah have mercy on him) that he related: "On the Day of Mihran I overpowered a man from among the chiefs of the Persians. I handed over his spoils to the ruler of the time, but I kept a gold ring of his for myself, and it had already been seen on my hand. I said (to myself): When I go out to the lands of the non-Arabs and I am in need of something, this is something that will be current (and profitable) there. Then I came to Sayyiduna Abdullah (may Allah be pleased with him) while the ring was on my hand. He asked: "What is this ring?" So I told him the whole story. He took the ring from me, put it in his mouth and chewed it, then threw it back to me and said: "the Prophet (peace and blessings be upon him) forbade the use of the gold ring.""