The Ma´mum should strictly follow the Imam

 276. Anas bin Malik narrated: The Prophet salla alayhi wa sallam fell down from the horse and grazed his right side. We went to him to inquire about his health, time of Salat (prayer) was due. He led us in prayer in a sitting position, and we performed the prayer behind him sitting. When he finished the prayer, he said: ´´The Imam is made only to be followed; so when he recited Takbir, you should also recite that; when he prostrates himself, you should also prostrate yourselves; when he rises up, you should also rise up; and when he says: ´Sami´ Allahuliman hamida´ you should say: ´Rabbana wa lakal.hamd´; and when he prays sitting, all of you should pray sitting.´´