مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 4393
Clothing
Signet-rings - Section 2
وَعَنِ ابْنِ عُمَرَ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يتختم فِي يسَاره. رَوَاهُ أَبُو دَاوُد
Ibn ‘Umar said the Prophet (ﷺ) used to wear a signet-ring on his left hand. Abu Dawud transmitted it.
Mishkat al-Masabih, 4393لم تتمّ دراسته (الألباني)