“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.’”
قَالَ رَسُولُ اللَّهِ ﷺ مَنْ صَلَّى صَلاَةً لَمْ يَقْرَأْ فِيهَا بِأُمِّ الْقُرْآنِ فَهِيَ خِدَاجٌ غَيْرُ تَمَامٍ فَقُلْتُ يَا أَبَا هُرَيْرَةَ فَإِنِّي أَكُونُ أَحْيَانًا وَرَاءَ الإِمَامِ فَغَمَزَ ذِرَاعِي وَقَالَ يَا فَارِسِيُّ اقْرَأْ بِهَا فِي نَفْسِكَ