al-Mughira bin Ziyad al-Bjly المغيرة بن زياد البجلي أبو هشام · The Book of Adornment

"The Messenger of Allah put on a ring, and he had some words inscribed on it. He said: 'We have put on a ring and have had some words engraved on it; no one of you should copy this inscription.'" Then Anas said: "It is as if I can see its whiteness on his hand."