The Prophet [SAW] wore a ring of silver with an Ethiopian stone (Fass), on which was inscribed (the phrase): "Muhammad Rasul Allah (Muhammad the Messenger of Allah)."
أَنَّ النَّبِيَّ ﷺ اتَّخَذَ خَاتَمًا مِنْ وَرِقٍ فَصُّهُ حَبَشِيٌّ وَنُقِشَ فِيهِ مُحَمَّدٌ رَسُولُ اللَّهِ