Narrated Anas bin Malik: "The Messenger of Allah (ﷺ) had a ring made from silver, so he had 'Muhammad, the Messenger of Allah' engraved on it. Then he said: 'Do not engrave with it.' This Hadith is Sahih Hasan. As for the meaning of his saying: "Do not engrave with it" - he was prohibiting that anyone have "Muhammad, Messenger of Allah" engraved on his ring.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ الْخَلاَّلُ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ ثَابِتٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم صَنَعَ خَاتَمًا مِنْ وَرِقٍ فَنَقَشَ فِيهِ مُحَمَّدٌ رَسُولُ اللَّهِ ثُمَّ قَالَ " لاَ تَنْقُشُوا عَلَيْهِ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ صَحِيحٌ حَسَنٌ . وَمَعْنَى قَوْلِهِ " لاَ تَنْقُشُوا عَلَيْهِ " . نَهَى أَنْ يَنْقُشَ أَحَدٌ عَلَى خَاتَمِهِ مُحَمَّدٌ رَسُولُ اللَّهِ .
sunnah.com