صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب صلاة التطوع فى السفر على الدوابChapters on Voluntary Prayers on Mounts while Traveling
(565) بَابُ إِبَاحَةِ الْوِتْرِ عَلَى الرَّاحِلَةِ فِي السَّفَرِ حَيْثُ تَوَجَّهَتْ بِالْمُصَلِّي الرَّاحِلَةُThe chapter on the permissibility of praying Witr on a mount during travel, wherever it faces
Hadith Q1261
ضِدَّ قَوْلِ مَنْ زَعَمَ أَنَّ حُكْمَ الْوِتْرِ حُكْمُ الْفَرِيضَةِ، وَأَنَّ الْوِتْرَ عَلَى الرَّاحِلَةِ غَيْرُ جَائِزٍ كَصَلَاةِ الْفَرِيضَةِ
Wherever the mount is facing, contrary to the statement of the person who says that the ruling of Witr is like that of the obligatory prayer and that it is not permissible to perform Witr on a mount like the obligatory prayer.
