‏الصلاة : Hadeeth No:771 'Ubada b. as-Samit reported from the Prophet of Allaah (sallAllaahu alayhi wa sallam ): He who does not recite Fatihat al-Kitab is not credited with having observed the prayer....

‏الصلاة : Hadeeth No:828 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) while teaching us (the principles of faith), said: Do not try to go ahead of the Imam, recite takbir when he recites it. and when he says:" Nor of those who err," you should say Amin, bow down when lie bows down, and when h...