"The Messenger of Allah (ﷺ) 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."
Reference: Sunan an-Nasa'i 5208 In-book : Book 48, Hadith 169 English translation : Vol. 6, Book 48, Hadith 5211
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