(35) باب فَضْلِ التَّأْمِينِ
It was narrated from Abu Hurairah that:
The Messenger of Allah (ﷺ) said: "If any one of you says: 'Amin' and the angels in Heaven say Amin, and the one coincides with the other, his previous sins will be forgiven." (ID)
Reference (ID): Sunan an-Nasa'i 930 (ID)
In-book reference (ID): Book 11, Hadith 55 (ID)
English translation (ID): Vol. 2, Book 11, Hadith 931 (ID)