Zayd bin al-Habab al-'Akli زيد بن الحباب أبو الحسين العكلي · The Book on Salat (Prayer)

the Prophet said "When the Imam says 'Amin' then (all of you) say 'Amin.' For whoever's 'Amin' concurs with the 'Amin' of the angels, then his past sins will be forgiven."

"Between the two prostrations, the Prophet would say: (Allahummaghfir li, warhamni, wajburni, wahdini, warzuqni). 'O Allah! Pardon me, have mercy on me, help me, guide me, and grant me sustenance.'"

"Allah's Messenger would recite: By the sun and its brightness, or similar Surah for the latter Isha (prayer)."

has a similar narration