Abdullah bin Buraidah narrated from his father that:
A man came to the Prophet [SAW] and he was wearing an iron ring. He said: Why do I see you wearing the jewelry of the people of Hell? He threw it away, then he came and he was wearing a brass ring. He said: Why do I notice the stench of idols from you? So he threw it away, and said: O Messenger of Allah, what should I use? He said: Silver, but it should not equal a Mithqal.