Sahih al-Bukhari, Hadith 5877 ⓘ
Narrated Anas bin Malik: Allah's Messenger 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 engraved on it, so none of you should have the same engraving on his ring."
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 أَحَدٌ عَلَى نَقْشِهِ " .
also referenced under: Book 77, Hadith 94 (In-Book) & Volume 7, Book 72, Hadith 766 (USC-MSA)