Sayyiduna Abdullah bin Umar, may Allah be pleased with them both, narrates: The Messenger of Allah, peace and blessings be upon him, led a group in the prayer of fear (Salat al-Khawf) for one rak'ah, while the other group remained facing the enemy. The first group, after praying one rak'ah, went to face the enemy, and the second group came and prayed one rak'ah with the Messenger of Allah, peace and blessings be upon him. When he, peace and blessings be upon him, concluded the prayer with salam, both these people and those people completed one rak'ah each.