Al-Kāfi
Hadith 2014عَنْهُ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ عَلِيِّ بْنِ أَسْبَاطٍ عَنْ عَلِيِّ بْنِ جَعْفَرٍ قَالَ سَأَلْتُ أَخِي مُوسَى ( عليه السلام ) عَنِ الْخَاتَمِ يُلْبَسُ فِي الْيَمِينِ فَقَالَ إِنْ شِئْتَ فِي الْيَمِينِ وَ إِنْ شِئْتَ فِي الْيَسَارِ .
9. It is narrated from the narrator of the previous Hadith from Muhammad ibn Ali from Ali ibn Asbat from Ali ibn Ja‘far who has said the following: “I once asked my brother, Musa (a.s.), about the ring; if it is worn on the right hand. He (the Imam) said, ‘You can wear it on the right or left, as you wish.’”