Allah's Messenger (ﷺ) (p.b.u.h) fell down from a horse and his right side was either injured or scratched, sowe went to inquire about his health. The time for the prayer became due and he offered the prayerwhile sitting and we prayed while standing. He said, "The Imam is to be followed; so if he saysTakbir, you should also say Takbir, and if he bows you should also bow; and when he lifts his headyou should also do the same and if he says: Sami`a l-lahu liman hamidah (Allah hears whoever sendshis praises to Him) you should say: Rabbana walakal-Hamd (O our Lord! All the praises are forYou.")