Narrated Anas bin Malik:
The Messenger of Allah (ﷺ) had a ring made from silver, so he had 'Muhammad, the Messenger of Allah' engraved on it. Then he said: 'Do not engrave with it.'
[Abu 'Eisa said:] This Hadith is Sahih Hasan. As for the meaning of his saying: Do not engrave with it - he was prohibiting that anyone have Muhammad, Messenger of Allah engraved on his ring.