Shama'il al-Muhammadiya 89
Ibn 'Umar (may Allah be pleased with him) says. "Messenger of Allah ﷺ kept his ring in his mubaarak hands (possession). Then it was kept by Abubakr (may Allah be pleased with him), then by 'Umar (may Allah be pleased with him). Thereafter by 'Uthmaan (may Allah be pleased with him). In his ('Uthmaan (may Allah be pleased with him)'s) time it fell in the Well of 'Arees. The inscription on this ring was 'Muhammadur Messenger of Allah"'.
حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، قَالَ: حَدَّثَنَا عَبْدُ اللهِ بْنُ نُمَيْرٍ، قَالَ: حَدَّثَنَا عُبَيْدُ اللهِ بْنُ عُمَرَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ: اتَّخَذَ رَسُولُ اللهِ ﷺ، خَاتَمًا مِنْ وَرِقٍ، فَكَانَ فِي يَدِهِ ثُمَّ كَانَ فِي يَدِ أَبِي بَكْرٍ، وَيَدِ عُمَرَ، ثُمَّ كَانَ فِي يَدِ عُثْمَانَ، حَتَّى وَقَعَ فِي بِئْرِ أَرِيسٍ، نَقْشُهُ: مُحَمَّدٌ رَسُولُ اللهِ.