Hadith 15:247
This hadith has been narrated on the authority of 'Ubaidullah with the same chain of transmitters and in the narration transmitted by Zubair (it is mentioned) that the upper side is that'which is at al-Batha
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ، وَمُحَمَّدُ بْنُ الْمُثَنَّى، قَالاَ حَدَّثَنَا يَحْيَى، - وَهُوَ الْقَطَّانُ - عَنْ عُبَيْدِ اللَّهِ، بِهَذَا الإِسْنَادِ . وَقَالَ فِي رِوَايَةِ زُهَيْرٍ الْعُلْيَا الَّتِي بِالْبَطْحَاءِ
Original Reference: Sahih Muslim 1257 b