Anas bin Malik:
Allah's Messenger (ﷺ) fell from a horse and got injured so he led the prayer sitting and we also prayed
sitting. When he completed the prayer he said, "The Imam is to be followed; if he says Takbir then say
Takbir, bow if he bows; raise your heads when he raises his head, when he says, 'Sami`a l-lahu liman
hamidah say, 'Rabbana laka l-hamd', and prostrate when he prostrates."