Sahih Muslim | Book 24 | Chapter 11

Narrated by Ibn Umar
Ibn Umar reported that Allah's Messenger (may peace be upon him) had made for himself a ring of silver, and he (wore it in his finger), then it was in Abu Bakr's finger, then it was in 'Umar's finger, then it was in 'Uthman's finger, until it fell into the well of Aris and it had these words engraved upon it (Muhammad, Messenger of Allah). Ibn Numair narrated it with a slight variation of words.

Narrated by Ibn Umar
Ibn Umar reported that Allah's Apostle (may peace be upon him) had made for himself a gold ring; then lie discarded it, and then made for himself a silver ring and had these words engraved upon it (Muhammad, Messenger of Allah), and said: No one should engrave anything like the engraving of this signet ring of mine and when he wore it, he kept its stone towards the inside of his palm, and it was this which fell down (from the hands) of Mu'ayqib into the well of Aris.

Narrated by Anas b. Malik
Anas b. Malik reported that Allah's Apostle (may peace be upon him) had made for him a silver ring and got engraved on it (Muhammad, Messenger of Allah) and said to the people I have got made a ring of silver and engraved in it (these words) (Muhammad, Messenger of Allah). So none should engrave these (words) like this engravement.

Narrated by Anas
This hadith has been reported on the authority of Anas through another chain of transmitters but there is no mention of the words (Muhammad, Messenger of Allah)in it.