Buraida reported the Prophet (ﷺ) as saying to a man who was wearing a signet-ring of yellow copper, “How is it that I notice the odour of idols in you ?” So he threw it away and came wearing an iron signet- ring, and when he said, “How is it that I see you wearing the adornment of the inhabitants of hell ?” he threw it away and asked Allah's Messenger ﷺ what material he should use. He replied, “Silver, but do not let it weigh as much as a mithqal.” Tirmidhi, Abu Dawud and Nasa’i transmitted it. Muhyi as-Sunna said there is a sound tradition on the authority of Sahl b. Sa'd about the dower that the Prophet (ﷺ) said to a man, “Seek something, even though it should be an iron signet-ring.”