The Book of Prayers (Kitab Al-Salat) 
Muslim :: Book 4 : Hadith 771
'Ubada b. as-Samit reported from the Apostle of Allah (may peace be upon him ): He who does not recite Fatihat al-Kitab is not credited with having observed the prayer.
The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 771
'Ubada b. as-Samit reported from the Apostle of Allah (may peace be upon him ): He who does not recite Fatihat al-Kitab is not credited with having observed the prayer.