53. If the Amin of any one coincides with that of the angels
Narrated by Abu Huraira (RA): The Prophet (ﷺ) said, "Say Amin" when the Imam says it and if the Amin of any one of you coincides with that of the angels then all his past sins will be forgiven." [1] Narrated by Abu Huraira (RA): Allah's Messenger (ﷺ) said, "Say Amen" when the Imam says 'Ghairil maghdubi 'alaihim walad daalleen' (not the path of those who earn Your Anger (such as Jews) nor of those who go astray (such as Christians); all the past sins of the person whose saying (Amin) coincides with that of the angels, will be forgiven". [2]
Related Duas:
Dua at the last part of the night
Dua at the begining of the prayer #1
Ten days of the month of Dhul Hijjah
Time to accept prayers (during Adhan, Iqamah, Raining and War)
Time when duas are accepted #2
About Lailatul Qadr
Dua when drinking Zamzam water with pure intention
Dua of Lailatul Qadr
After awaking at night, reciting some specific duas
Dua at the begining of the prayer #2
Dua in the state of prostration
Dua for one who afflicted by a calamity