"Messenger of Allah prayed the Subh prayer, and he had difficulty with the recitation. When turned (after finishing) he said: 'I think that you are reciting behind your Imam?'" He said: "We said: 'Yes, Messenger of Allah, by Allah!' He said: 'Do not do that, except for Umm Al-Kitab, for there is no Salat for one who does not recite it.'"  

صَلَّى رَسُولُ اللَّهِ ﷺ الصُّبْحَ فَثَقُلَتْ عَلَيْهِ الْقِرَاءَةُ فَلَمَّا انْصَرَفَ قَالَ إِنِّي أَرَاكُمْ تَقْرَءُونَ وَرَاءَ إِمَامِكُمْ قَالَ قُلْنَا يَا رَسُولَ اللَّهِ إِي وَاللَّهِ قَالَ فَلاَ تَفْعَلُوا إِلاَّ بِأُمِّ الْقُرْآنِ فَإِنَّهُ لاَ صَلاَةَ لِمَنْ لَمْ يَقْرَأْ بِهَا قَالَ وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَعَائِشَةَ وَأَنَسٍ وَأَبِي قَتَادَةَ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو