Shama'il al-Muhammadiya 83

Ibn Umar (may Allah be pleased with him) says that Messenger of Allah sallallahu alayhe wasallam had a ring made of silver. He used it as a seal (Stamp) on letters etc., but did not wear it

حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ أَبِي بِشْرٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ ﷺ اتَّخَذَ خَاتَمًا مِنْ فِضَّةٍ، فَكَانَ يَخْتِمُ بِهِ وَلا يَلْبَسُهُ.