Hammad bin Salama حماد بن سلمة · The Book of Adornment

"I heard the Messenger of Allah say: 'Whoever does not take from his mustache, he is not one of us.'"

"The Messenger of Allah forbade me (to wear) gold rings and Al-Qassi, Al-Mitharah, and Al-Ji'ah."

A man came to the Prophet 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."

A man from among the Companions of the Prophet used to forbid too much of Al-Irfah." Ibn Buraidah was asked what too much of Al-Irfah meant, and he said: "It includes combing the hair."