Musannaf Ibn Abi Shayba 16:930

Abu Bakr narrated to us, he said: Marwan bin Mu'awiyah narrated to us, from Abu al-Qasim al-Azdi, he said: I asked Anas bin Malik, "Do you wear a ring of gold?" He said, "Yes, and if you wish, [you may wear one] of silver; it does not harm you. But do not eat from a vessel of gold or silver."