Arabic (Original)
حَدَّثَنَا إِسْمَاعِيلُ حَدَّثَنَا أَيُّوبُ عَنْ سَعِيدِ بْنِ جُبَيْرٍ أَنَّ ابْنَ عُمَرَ كَانَ يُصَلِّي عَلَى رَاحِلَتِهِ تَطَوُّعًا فَإِذَا أَرَادَ أَنْ يَسْجُدَ نَزَلَ فَأَوْتَرَ عَلَى الْأَرْضِ.
English Translation
Isma'il told us, Ayyub told us, from Sa'id ibn Jubayr: that Ibn Umar used to pray the voluntary prayer on his mount, and when he wanted to prostrate, he would dismount and perform the witr on the ground.