It wasnarrated from Anas bin Malik that the Messenger of Allah (ﷺ)wore aring of silver, in which was an Ethiopian gemstone and theinscription:
'Muhammad Rasul Allah' (Muhammad the Messenger ofAllah)." (IT)
English reference (IT): Vol. 4, Book 32, Hadith 3641 (IT)
Arabic reference (IT): Book 32, Hadith 3772 (IT)