Hammad ibn Salama said: "I saw Ibn Abi Rafi' wearing a signet ring on his right hand, so I asked him about that and he said: 'I saw 'Abdu llah ibn Ja'far wearing a signet ring on his right hand', and 'Abdullah ibn Ja'far said: 'Allah’s Messenger (Allah bless him and give him peace) used to wear a signet ring on his right hand'.”