"The Prophet (Allah bless him and give him peace) chose a signet ring of silver, and put its stone in the part close to the
palm of his hand. On it he engraved: “Muhammad is the Messenger of Allah,” and he forbade anyone to engrave on it. It is the one that fell from Mu'aiqib into the well of Aris.”
حَدَّثَنَا مُحَمَّدُ بْنُ حُمَيْدٍ الرَّازِيُّ، قَالَ: حَدَّثَنَا جَرِيرٌ، عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ، عَنِ الصَّلتِ بْنِ عَبْدِ اللهِ، قَالَ: كَانَ ابْنُ عَبَّاسٍ، يَتَخَتَّمُ فِي يَمِينِهِ، وَلا إِخَالُهُ إِلا قَالَ: كَانَ رَسُولُ اللهِ صلى الله عليه وسلم يَتَخَتَّمُ فِي يَمِينِهِ.
Narrated ‘As-Salt ibn 'Abdi’llah said:
“Ibn 'Abbas used to wear a signet ring on his right hand, without adornment, and he said: 'Allah’s Messenger (Allah bless him and give him peace) used to wear a signet ring on his right hand'.”