(71) باب مَا جَاءَ فِي فَضْلِ التَّأْمِينِ
Abu Hurairah narrated that :
the Prophet said "When the Imam says 'Amin' then (all of you) say 'Amin.' For whoever's 'Amin' concurs with the 'Amin' of the angels, then his past sins will be forgiven." (ES)
Reference (ES): Jami` at-Tirmidhi 250 (ES)
In-book reference (ES): Book 2, Hadith 102 (ES)
English translation (ES): Vol. 1, Book 2, Hadith 250 (ES)