Musnad Ahmad 30:2922

Muhammad ibn Ja'far narrated to us, he said: Shu'bah narrated to us, and Hajjaj said: Shu'bah narrated to me, from Qatadah, he said: I heard An-Nadr ibn Anas narrating from Bashir ibn Nahik, from Abu Hurairah, from the Prophet, peace and blessings of Allah be upon him: "That he forbade the gold ring."