Signet-rings - Section 1 Mishkat al-Masabih 4389
Arabic hadith text
وَعَنْهُ قَالَ: كَانَ خَاتَمُ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي هَذِهِ وَأَشَارَ إِلَى الْخِنْصِرِ منْ يَده الْيُسْرَى. رَوَاهُ مُسلم
Translation
He said, pointing to the little finger of his left hand, “The Prophet’s signet-ring was on this.” Muslim transmitted it.