Musnad Abu Ya'la al-Mawsili 166:13

Abu Bakr ibn Abi Shaybah narrated to us, Ibn Numayr narrated to us, from Ibrahim ibn al-Fadl, from Abdullah ibn Muhammad ibn Aqil, from Abdullah ibn Ja’far, who said: I saw the ring of the Prophet, may Allah bless him and grant him peace, on his right hand.