صحيح مسلم 924

Anas reported:The Messenger of Allah (ﷺ) rode a horse and fell down from it and his right side was grazed, and the rest of the hadith is the same, and (these words) are found in it:" When he (the Imam) says prayer in an erect posture, you should also say it in an erect posture

Rapporté par Anas رضي الله عنه : Le Messager d’Allah ﷺ monta un cheval, tomba et son côté droit fut éraflé, et le reste du hadith est le même, et on y trouve : « Quand l’imam prie debout, priez aussi debout. »