The Prophet ﷺ said, "While defecating, neither face nor turn your back to the Qibla but face either east or west." Abu Aiyub added. "When we arrived in Sham we came across some lavatories facing the Qibla; therefore we turned ourselves while using them and asked for Allah's forgiveness."  

أَنَّ النَّبِيَّ ﷺ قَالَ إِذَا أَتَيْتُمُ الْغَائِطَ فَلاَ تَسْتَقْبِلُوا الْقِبْلَةَ وَلاَ تَسْتَدْبِرُوهَا وَلَكِنْ شَرِّقُوا أَوْ غَرِّبُوا قَالَ أَبُو أَيُّوبَ فَقَدِمْنَا الشَّأْمَ فَوَجَدْنَا مَرَاحِيضَ بُنِيَتْ قِبَلَ الْقِبْلَةِ فَنَنْحَرِفُ وَنَسْتَغْفِرُ اللَّهَ تَعَالَى وَعَنِ الزُّهْرِيِّ عَنْ عَطَاءٍ قَالَ سَمِعْتُ أَبَا أَيُّوبَ عَنِ النَّبِيِّ ﷺ مِثْلَهُ  

People say, "Whenever you sit for answering the call of nature, you should not face the Qibla or Baitul-Maqdis (Jerusalem)." I told them. "Once I went up the roof of our house and I saw Allah's Apostle answering the call of nature while sitting on two bricks facing Baitul-Maqdis (Jerusalem) (but there was a screen covering him. ' (Fath-al-Bari, Page 258, Vol. 1).  

أَنَّهُ كَانَ يَقُولُ إِنَّ نَاسًا يَقُولُونَ إِذَا قَعَدْتَ عَلَى حَاجَتِكَ فَلاَ تَسْتَقْبِلِ الْقِبْلَةَ وَلاَ بَيْتَ الْمَقْدِسِ فَقَالَ عَبْدُ اللَّهِ بْنُ عُمَرَ لَقَدِ ارْتَقَيْتُ يَوْمًا عَلَى ظَهْرِ بَيْتٍ لَنَا فَرَأَيْتُ رَسُولَ اللَّهِ ﷺ عَلَى لَبِنَتَيْنِ مُسْتَقْبِلاً بَيْتَ الْمَقْدِسِ لِحَاجَتِهِ وَقَالَ لَعَلَّكَ مِنَ الَّذِينَ يُصَلُّونَ عَلَى أَوْرَاكِهِمْ فَقُلْتُ لاَ أَدْرِي وَاللَّهِ قَالَ مَالِكٌ يَعْنِي الَّذِي يُصَلِّي وَلاَ يَرْتَفِعُ عَنِ الأَرْضِ يَسْجُدُ وَهُوَ لاَصِقٌ بِالأَرْضِ  

I went up to the roof of Hafsa's house for some job and I saw Messenger of Allah ﷺ answering the call of nature facing Sham (Syria, Jordan, Palestine and Lebanon regarded as one country) with his back towards the Qibla. (See Hadith No. 147).  

ارْتَقَيْتُ فَوْقَ ظَهْرِ بَيْتِ حَفْصَةَ لِبَعْضِ حَاجَتِي فَرَأَيْتُ رَسُولَ اللَّهِ ﷺ يَقْضِي حَاجَتَهُ مُسْتَدْبِرَ الْقِبْلَةِ مُسْتَقْبِلَ الشَّأْمِ