It was narrated that Abu Hurairah said: “The Messenger of Allah صلی اللہ علیہ وآلہ وسلم said: ‘The Imam is appointed to be followed, so when he says the Takbir, say the Takbir, and when he recites, be silent.” Abu ‘Abdur-Rahman said: Al Mukharrimi would say: He his trustworthy — meaning — Muhammad bin Saad Al-Ansari. (Sahih)