حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ عَنْ سُفْيَانَ عَنِ الْأَعْمَشِ قَالَ سَأَلْتُ إِبْرَاهِيمَ عَنْ الرَّجُلِ يُصَلِّي مَعَ الْإِمَامِ فَقَالَ يَقُومُ عَنْ يَسَارِهِ فَقُلْتُ حَدَّثَنِي سُمَيْعٌ الزَّيَّاتُ قَالَ سَمِعْتُ ابْنَ عَبَّاسٍ يُحَدِّثُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَقَامَهُ عَنْ يَمِينِهِ فَأَخَذَ بِهِ
مسند امام احمد بن حنبل · Hadith 3359
It was narrated that al- A'mash said: I asked Ibraheem about a man praying with the imam. He said: He should stand to his left. I said: Sumai' az-Zayyat told me: I heard Ibn 'Abbas (RA) narrate that the Prophet (PBUH) made him stand on his right, and he accepted that.
Sanad
حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ عَنْ سُفْيَانَ عَنِ الْأَعْمَشِ