(33) باب جَهْرِ الإِمَامِ بِآمِينَ
It was narrated from Abu Hurairah that:
The Prophet (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" (FR)
Reference (FR): Sunan an-Nasa'i 926 (FR)
In-book reference (FR): Book 11, Hadith 51 (FR)
English translation (FR): Vol. 2, Book 11, Hadith 927 (FR)