"The inscription on the ring of the Messenger of Allah [SAW] was: Muhammad Rasul Allah (Muhammad the Messenger of Allah).'" (Using translation from Nasāʾī 5276)  

كَانَ نَقْشُ خَاتَمِ رَسُولِ اللهِ ﷺ مُحَمَّدٌ رَسُولُ اللهِ  

"The Messenger of Allah [SAW] said: 'We have had a ring made with an inscription, and no one else should copy this inscription.'" (Using translation from Nasāʾī 5281)  

قَالَ رَسُولُ اللهِ ﷺ «قَدِ اصْطَنَعْنَا خَاتَمًا وَنَقَشْنَا عَلَيْهِ نَقْشًا فَلَا يَنْقُشْ عَلَيْهِ أَحَدٌ»  

The Prophet [SAW] had a ring and he said: "We have had a ring made with an inscription, and no one else should copy this inscription." It is as if I can see its shining on the little finer of the Messenger of Allah [SAW]. (Using translation from Nasāʾī 5282)  

أَنَّ النَّبِيَّ ﷺ اصْطَنَعَ خَاتَمًا فَقَالَ «إِنَّا قَدِ اتَّخَذْنَا خَاتَمًا وَنَقَشْنَا عَلَيْهِ نَقْشًا فَلَا يَنْقُشْ عَلَيْهِ أَحَدٌ فإِنِّي لَأَرَى بَرِيقَهُ فِي خِنْصَرِ رَسُولِ اللهِ ﷺ»