The Book of Adornment
48/78. Chapter:
Description of the Ring of the Prophet [SAW] and its Inscription
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا ابْنُ وَهْبٍ، عَنْ يُونُسَ، عَنِ الزُّهْرِيِّ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم اتَّخَذَ خَاتَمًا مِنْ وَرِقٍ وَفَصُّهُ حَبَشِيٌّ .
It was narrated from Anas that: The Messenger of Allah [SAW] put on a ring of silver with an Ethiopian stone (Fass).
Reference : Sunan an-Nasa'i 5279In-book reference : Book 48, Hadith 240English translation : Vol. 6, Book 48, Hadith 5281