"None should have the same engraving made on his ring as the engraving on my ring."

Sahih al-Bukhari · Book 77 · Hadith 5877

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا حَمَّادٌ، عَنْ عَبْدِ الْعَزِيزِ بْنِ صُهَيْبٍ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم اتَّخَذَ خَاتَمًا مِنْ فِضَّةٍ، وَنَقَشَ فِيهِ، مُحَمَّدٌ رَسُولُ اللَّهِ‏.‏ وَقَالَ ‏"‏ إِنِّي اتَّخَذْتُ خَاتَمًا مِنْ وَرِقٍ، وَنَقَشْتُ فِيهِ، مُحَمَّدٌ رَسُولُ اللَّهِ‏.‏ فَلاَ يَنْقُشَنَّ أَ…

Narrated Anas bin Malik: Allah's Messenger (ﷺ) took a silver ring and had 'Muhammad, the Apostle' of Allah' engraved on it. The Prophet then said (to us), 'I have a silver ring with 'Muhammad, the Messenger of Allah (ﷺ)…