Narrated Ibn 'Umar (RA): I went on an expedition with Allah's Messenger ( صلی اللہ علیہ وسلم ) to Najd, and when we came in front of the enemy we lined up in ranks facing them. Allah's Messenger ( صلی اللہ علیہ وسلم ) then stood up and led us in prayer. One group stood up with him while the other faced the enemy. He prayed a Rak'ah with those who were with him and made two prostrations. Then, they changed places with those who had not prayed. When they came Allah's Messenger ( صلی اللہ علیہ وسلم ) prayed a Rak'ah with them and made two prostrations. He then uttered the Taslim (salutation) and each of them got up and prayed a Rak'ah alone and made two prostrations. [Agreed upon, and the wording if from al-Bukhari] .