It was
narrated from Abu Sa’ib that he heard Abu Hurairah say:
“The
Messenger of Allah (ﷺ) said: ‘Whoever performs a prayer in which
he
does not recite Ummul Qur’an (the Mother of the Qur’an, i.e.,
Al-
Fatihah), it is deficient; not complete.’” I said: ‘O Abu
Hurairah,
sometimes I am behind the Imam. He pressed my forearm and
said: ‘O
Persian! Recite it to yourself.’”