The Book of Prayers
4/11. Chapter:
It Is Obligatory To Recite Al-Fatihah In Every Rak'ah; If A Person Cannot Recite Al-Fatihah Or Cannot Learn It, Then He Should Recite Whatever Else He Can Manage
Sahih Muslim
حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ الْحُلْوَانِيُّ، حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ بْنِ سَعْدٍ، حَدَّثَنَا أَبِي، عَنْ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ مَحْمُودَ بْنَ الرَّبِيعِ الَّذِي، مَجَّ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي وَجْهِهِ مِنْ بِئْرِهِمْ أَخْبَرَهُ أَنَّ عُبَادَةَ بْنَ الصَّامِتِ أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ صَلاَةَ لِمَنْ لَمْ يَقْرَأْ بِأُمِّ الْقُرْآنِ " .
Mahmud b. al-Rabi', on whose face the Messenger of Allah (ﷺ) squirted water from the well, reported on the authority of 'Ubada b. as- Samit that the Messenger of Allah (ﷺ) said: He who does not recite Umm al-Qur'an is not credited with having observed prayer.
Reference : Sahih Muslim 394cIn-book reference : Book 4, Hadith 39USC-MSA web (English) reference : Book 4, Hadith 773