Sahih al-Bukhari 943
صحيح البخاري#943Sahihحَدَّثَنَا سَعِيدُ بْنُ يَحْيَى بْنِ سَعِيدٍ الْقُرَشِيُّ، قَالَ حَدَّثَنِي أَبِي قَالَ، حَدَّثَنَا ابْنُ جُرَيْجٍ، عَنْ مُوسَى بْنِ عُقْبَةَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، نَحْوًا مِنْ قَوْلِ مُجَاهِدٍ إِذَا اخْتَلَطُوا قِيَامًا. وَزَادَ ابْنُ عُمَرَ عَنِ النَّبِيِّ صلى الله عليه وسلم " وَإِنْ كَانُوا أَكْثَرَ مِنْ ذَلِكَ فَلْيُصَلُّوا قِيَامًا وَرُكْبَانًا ".
Narrated Nafi`:Ibn `Umar said something similar to Mujahid's saying: Whenever (Muslims and non-Muslims) stand face to face in battle, the Muslims can pray while standing. Ibn `Umar added, "The Prophet (ﷺ) said, 'If the number of the enemy is greater than the Muslims, they can pray while standing or riding (individually)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 12:2