Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) had a silver ring made, which he (peace and blessings be upon him) used to wear on his hand. After him (peace and blessings be upon him) it was on the hand of Sayyiduna Abu Bakr (may Allah be pleased with him), then it remained on the hand of Sayyiduna Umar (may Allah be pleased with him), then it was on the hand of Sayyiduna Uthman (may Allah be pleased with him), until it fell from him into the well of Aris. On it was engraved: "Muhammad Rasulullah" (Muhammad is the Messenger of Allah).
Abdul Aziz bin Abi Rawwad narrated on the authority of Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) used to wear his ring on his left hand. Nafi' (may Allah have mercy on him) said that Sayyiduna Ibn Umar (may Allah be pleased with them both) used to wear his ring on his left hand. It is possible that the ring he (peace and blessings be upon him) put on his right hand was the gold ring, which he then threw away, and the one he put on his left hand was the silver ring. This reconciles the two narrations.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7564