Musannaf Ibn Abi Shayba 16:869

Abu Bakr narrated to us, he said: Ibn 'Ulayyah narrated to us, from 'Abd al-'Aziz ibn Suhayb, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) had a ring made. He said: "We have fashioned a ring and we have engraved an engraving upon it, so let no one engrave upon it."