(11) باب وُجُوبِ قِرَاءَةِ الْفَاتِحَةِ فِي كُلِّ رَكْعَةٍ وَإِنَّهُ إِذَا لَمْ يُحْسِنِ الْفَاتِحَةَ وَلاَ أَمْكَنَهُ تَعَلُّمُهَا قَرَأَ مَا تَيَسَّرَ لَهُ مِنْ غَيْرِهَا
'Ubada b. as-Samit reported from the Messenger of Allah (may peace be upon him ):
He who does not recite Fatihat al-Kitab is not credited with having observed the prayer. (PT)
Reference (PT): Sahih Muslim 394 a (PT)
In-book reference (PT): Book 4, Hadith 37 (PT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 771 (PT)