صحيح مسلم 935

Abu Huraira reported Allah's Messenger (ﷺ) saying:The Imam is appointed to be followed. So recite takbir when he recites it, and bow down when he bows down and when he utters:" Allah listens to him who praises Him," say" O Allah, our Lord, for Thee be the praise." And when he prays, standing, you should pray standing. And when he prays sitting, all of you should pray sitting

Rapporté par Abu Huraira رضي الله عنه : Le Messager d’Allah ﷺ a dit : « L’imam est désigné pour être suivi. Dites le takbir quand il le dit, inclinez-vous quand il s’incline, et quand il dit : “Allah entend celui qui Le loue”, dites : “Ô Allah, notre Seigneur, à Toi la louange.” Quand il prie debout, priez debout, et quand il prie assis, priez tous assis. »