Mukhtasar Sahih Al-Bukhari

I took part in a holy battle with Allâh's Messenger (ﷺ) in Najd. We faced the enemy and arranged ourselves in rows. Then Allâh's Messenger (ﷺ) stood up to lead the (prayer) and one party stood to pray with him while the other faced the enemy, Allâh's Messenger (ﷺ) and the former party bowed and performed two prostrations. Then that party left (after completing their 2nd Rak'a individually with Taslim, while the Prophet (ﷺ) kept on standing). Then they took the place of those who had not prayed. [The second (latter) party joined] Allâh's Messenger (ﷺ) who prayed one Rak‘a (i.e. his 2nd Rak'a with the latter party) and performed two prostrations and finished his Salât (prayer) with Taslîm. Then everyone of them [the 2nd (latter) party] bowed once and performed two prostrations individually [i.e., completed their 2nd Rak'a and finished their (prayer) with Taslîm]. [2:64-O.B.]

Ibn 'Umar said in another quotation, "The Prophet (ﷺ) said, 'If the number of the enemy is greater than the Muslims, they can offer Salât (prayer) while standing or riding (individually)." [2:65-O.B.]

When the Prophet (ﷺ) returned from the battle of Al-(confederates), he said to us, None should offer the ' prayer but at Banî Quraiza." The ' prayer became due for some of them on the way. Some of them decided not to offer the Salât (prayer) but at Banî Quraiza while some others decided to offer the (prayer) on the spot and said that the intention of the Prophet (ﷺ) vas not what the former party had understood. And when that was told to the Prophet (ﷺ) he did not blame anyone of them. [2:67 (B)-O.B.]