Jamil bin Zayd said: I saw five of the Companions of the Messenger of Allah (peace and blessings be upon him) wearing gold rings, among them Zayd bin Jariyah, Zayd bin Arqam, al-Bara' bin Azib, Anas bin Malik and Abdullah bin Yazid.
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5129