Musnad Abu Ya'la al-Mawsili 118:9

Zuhayr ibn Harb narrated to us, Uthman ibn Umar narrated to us, Yunus narrated to us, from al-Zuhri, from Anas ibn Malik, that the Messenger of Allah (ﷺ) took a ring of silver, which had an Abyssinian stone, and its engraving was "Muhammad the Messenger of Allah."