Is it narrated that the Prophet (peace be upon him) used to say "Amin" after the Fatiha in his prayer?

Saying "Ameen" after reciting Al-Fatihah is affirmed and commanded by the Prophet, peace and blessings be upon him. In the agreed-upon Hadith narrated by Abu Hurairah, the Prophet, peace and blessings be upon him, said: "When the Imam says 'Ameen,' then say 'Ameen,' for whoever's 'Ameen' coincides with the 'Ameen' of the angels, his past sins will be forgiven." And the Messenger of Allah, peace and blessings be upon him, used to say: "Ameen."