Narrated Anas bin Malik: Allah's Apostle wanted to write a letter to a group of people or some non-Arabs. It was said to him, "They do not accept any letter unless it is stamped." So the Prophet had a silver ring made for himself, and on it was engraved: 'Muhammad, the Apostle of Allah'. .. as if I am now looking at the glitter of the ring on the finger (or in the palm) of the Prophet .
Hadith Referenceصحيح البخاري / كتاب اللباس / 5872
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Narrated Ibn `Umar: Allah's Apostle had a silver ring made for himself and it was worn by him on his hand. Afterwards it was worn by Abu Bakr, and then by `Umar, and then by `Uthman till it fell in the Aris well. (On that ring) was engraved: 'Muhammad, the Apostle of Allah."
Hadith Referenceصحيح البخاري / كتاب اللباس / 5873
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة