"The Messenger of Allah (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"
Sunan an-Nasa'i Book 11, Hadith 50
← Previous Hadith "A man came to the Prophet (ﷺ) and said: 'I cannot learn anything of the Quran; teach me something that I can say instead of reciting the Quran.' He said: 'Say: SubhanAllah, wal-hamdulilah, wa la illaha ill-Allah, wa Allahu Akbar, wa la hawla wa la quwwata illa Billahil-aliy al-azim (Glory be to Allah, praise be to Allah, there is none worthy of worship except Allah, Allah is Most Great, and there is no power and no strength except with Allah the Exalted and Magnificent ).'"

Sunan an-Nasa'i Book 11, Hadith 49 Next Hadith → 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"

Sunan an-Nasa'i Book 11, Hadith 51