Language:
كتاب اللباس
77  
Dress
(54)
Chapter: "None should have the same engraving made on his ring as the engraving on my ring."
(54)
باب قَوْلِ النَّبِيِّ صلى الله عليه وسلم ‏"‏ لاَ يَنْقُشُ عَلَى نَقْشِ خَاتَمِهِ ‏"‏‏.‏
Sahih al-Bukhari 5877

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 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 ‏"‏‏.‏
Reference : Sahih al-Bukhari 5877
In-book reference : Book 77, Hadith 94
USC-MSA web (English) reference : Vol. 7, Book 72, Hadith 766
  (deprecated numbering scheme)