Sahih al-Bukhari, Hadith 1093 ⓘ
Narrated `Abdullah bin 'Amir from his father who said: I saw the Prophet (p.b.u.h) offering the prayer on his mount (Rahila) whatever direction it took.
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا عَبْدُ الأَعْلَى، قَالَ حَدَّثَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ عَامِرٍ، عَنْ أَبِيهِ، قَالَ رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم يُصَلِّي عَلَى رَاحِلَتِهِ حَيْثُ تَوَجَّهَتْ بِهِ.
also referenced under: Book 18, Hadith 13 (In-Book) & Volume 2, Book 20, Hadith 198 (USC-MSA)