Volume 8, Book 75, Number 411:
Narrated Abu Huraira:
The Prophet said, “When the Imam says ‘Amin’, then you should all say ‘Amin’, for the angels say
‘Amin’ at that time, and he whose ‘Amin’ coincides with the ‘Amin’ of the angels, all his past sins will
be forgiven.”
Volume 8 – 1427 / 1700
SAHIH BUKHARI VOLUME 8 > BOOK 75: INVOCATIONS