Anas b. Malik reported that Allah's Apostle (ﷺ) had made for him a silver ring. and got engraved on it (Muhammad, Messenger of Allah) and said to the people I have got made a ring of silver and engraved in it (these words) (Muhammad, Messenger of Allah). So none should engrave these (words) like this engravement.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَخَلَفُ بْنُ هِشَامٍ، وَأَبُو الرَّبِيعِ الْعَتَكِيُّ، كُلُّهُمْ عَنْ حَمَّادٍ، - قَالَ يَحْيَى أَخْبَرَنَا حَمَّادُ بْنُ زَيْدٍ، - عَنْ عَبْدِ الْعَزِيزِ بْنِ صُهَيْبٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّوسلم اتَّخَذَ خَاتَمًا مِنْ فِضَّةٍ وَنَقَشَ فِيهِ مُحَمَّدٌ رَسُولُ اللَّهِ . وَقَالَ لِلنَّاسِ " إِنِّي اتَّخَذْتُ خَاتَمًا مِنْ فِضَّةٍ وَنَقَشْتُ فِيهِ مُحَمَّدٌ رَسُولُ اللَّهِ . فَلاَ يَنْقُشْ أَحَدٌ عَلَى نَقْشِهِ " .
Muslim
The Book of Clothes and Adornment • Hadith 93