Salim bin Abdullah bin Umar reported: The Messenger of Allah ﷺ (may peace he upon him) led one of the two groups In one rakah of prayer in danger, while the other group faced the enemy. Then they (the members of the first group) went back and replaced their companions who were facing the enemy. And then they (the members of the second group) came and the Apostle of Allah ﷺ led them in one rakah of prayer. Then the Apostle of Allah ﷺ pronounced salutation, and then they (the members of the Ant group) completed the rakah and they (the members of the second group) completed the rakah.