Shortening the Prayers (At-Taqseer)
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.Narrated `Abdullah bin 'Amir from his father who said:I saw the Prophet (ﷺ) offering the prayer on his mount (Rahila) whatever direction it took
From Sahih al-Bukhari, whose reports the scholars accept as authentic.