سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 5276
The Book of Adornment
Description of the Ring of the Prophet (ﷺ) [ﷺ] and its Inscription
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا مُحَمَّدُ بْنُ بِشْرٍ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ كَانَ نَقْشُ خَاتَمِ رَسُولِ اللَّهِ صلى الله عليه وسلم مُحَمَّدٌ رَسُولُ اللَّهِ .
It was narrated that Ibn 'Umar said: "The inscription on the ring of the Messenger of Allah [ﷺ] was: Muhammad Rasul Allah (Muhammad the Messenger of Allah).'"
Sunan an-Nasa'i, 5276Sahih (Darussalam)