Narrator:Abu Hurayrah
أَخْبَرَنَا عَمْرُو بْنُ عُثْمَانَ، قَالَ حَدَّثَنَا بَقِيَّةُ، عَنِ الزُّبَيْدِيِّ، قَالَ أَخْبَرَنِي الزُّهْرِيُّ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم
" إِذَا أَمَّنَ الْقَارِئُ فَأَمِّنُوا فَإِنَّ الْمَلاَئِكَةَ تُؤَمِّنُ فَمَنْ وَافَقَ تَأْمِينُهُ تَأْمِينَ الْمَلاَئِكَةِ غَفَرَ اللَّهُ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ "
It was narrated that Abu Hurairah said:
"The Messenger of Allah (ﷺ) said: 'When the reciter says Amin, then say: "Amin" too, for the angels say Amin and if a person's Amin coincides with the Amin of the angels, Allah will forgive his previous sins"
Reported by An-Nasa’i (No. 925, 926, 927, 928, 929), Al-Bukhari (No. 780, 782, 4475, 6402), Muslim (No. 410a), Abu Dawud (No. 935, 936), At-Tirmidhi (No. 250), Ibn Majah (No. 851, 852), Malik (No. 194, 195), Ahmad (No. 6890, 6946, 9541, 9542) and Ad-Darimi (No. 1218).