"The Messenger of Allah [SAW] came out wearing a silver ring. He said: 'Whoever wants to make a ring like this, let him do so, but do not put the same inscription.'" (Using translation from Nasāʾī 5207)  

خَرَجَ رَسُولُ اللهِ ﷺ وَقَدِ اتَّخَذَ حَلْقَةً مِنْ فِضَّةٍ فَقَالَ «مَنْ أَرَادَ أَنْ يَصُوغَ عَلَيْهِ فَلْيَفْعَلْ وَلَا تَنْقُشُوا عَلَى نَقْشِهِ»  

"The Messenger of Allah [SAW] put on a ring, and he had some words inscribed on it. He said: 'We have put on a ring and have had some words engraved on it; no one of you should copy this inscription.'" Then Anas said: "It is as if I can see its whiteness on his hand." (Using translation from Nasāʾī 5208)  

اتَّخَذَ رَسُولُ اللهِ ﷺ خَاتَمًا وَنَقَشَ فِيهِ نَقْشًا وَقَالَ «إِنَّا قَدِ اتَّخَذْنَا خَاتَمًا وَنَقَشْنَا فِيهِ نَقْشًا فَلَا يَنْقُشُ أَحَدٌ عَلَى نَقْشِهِ» ثُمَّ قَالَ أَنَسٌ فَكَأَنِّي أَنْظُرُ إِلَى وَبِيصِهِ فِي يَدِهِ