It was narrated from Ibn 'Umar that:
The Messenger of Allah [SAW] had a ring made of gold and he used to wear it with the stone (Fass) against his palm, and the people did likewise. Then he sat on the Minbar and said: I used to wear this ring and put its stone (Fass) on the inside. Then he threw it away and said: By Allah, I will never wear it again. And the people threw their rings away.