#1082 Narrated Anas bin Malik:
Allah's Messenger (ﷺ) (p.b.u.h) fell down from a horse and his right side was either injured or scratched, so
we went to inquire about his health. The time for the prayer became due and he offered the prayer
while sitting and we prayed while standing. He said, "The Imam is to be followed; so if he says
Takbir, you should also say Takbir, and if he bows you should also bow; and when he lifts his head
you should also do the same and if he says: Sami`a l-lahu liman hamidah (Allah hears whoever sends
his praises to Him) you should say: Rabbana walakal-Hamd (O our Lord! All the praises are for
You.") (See Hadith No. 656 Vol. 1).