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:
Before salam #2
Dua of Yunus (AS)
While reciting Surah Fatiha behind the Imam
Dua when drinking Zamzam water with pure intention
About Lailatul Qadr
When the rooster crows
Time to accept prayers (during Adhan, Iqamah, Raining and War)
When the heart is devoted to Allah
Reciting specific dua after ablution
Dua after every obligatory prayer
Time when duas are accepted #2
Dua after rising from rukoo