Mishkat al-Masabih
Ibn ‘Umar said the Prophet (ﷺ) used to wear a signet-ring on his left hand. Abu Dawud transmitted it.
وَعَنِ ابْنِ عُمَرَ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يتختم فِي يسَاره. رَوَاهُ أَبُو دَاوُد
Reference
Ibn ‘Umar said the Prophet (ﷺ) used to wear a signet-ring on his left hand. Abu Dawud transmitted it.
وَعَنِ ابْنِ عُمَرَ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يتختم فِي يسَاره. رَوَاهُ أَبُو دَاوُد
Reference