Sahih al-Bukhari 4140

Arabic

حَدَّثَنَا آدَمُ، حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ، حَدَّثَنَا عُثْمَانُ بْنُ عَبْدِ اللَّهِ بْنِ سُرَاقَةَ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ الأَنْصَارِيِّ، قَالَ رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم فِي غَزْوَةِ أَنْمَارٍ يُصَلِّي عَلَى رَاحِلَتِهِ، مُتَوَجِّهًا قِبَلَ الْمَشْرِقِ مُتَطَوِّعًا‏.‏

English translation

Narrated Jabir bin `Abdullah Al-Ansari:I saw the Prophet (ﷺ) offering his Nawafil prayer on his Mount facing the East during the Ghazwa of Anmar

Reference: Sahih al-Bukhari 4140, Book of Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi). English translation by Dr. Muhammad Muhsin Khan.