(4) باب مَا جَاءَ فِي بُيُوتِ أَزْوَاجِ النَّبِيِّ صلى الله عليه وسلم، وَمَا نُسِبَ مِنَ الْبُيُوتِ إِلَيْهِنَّ
Narrated `Abdullah bin `Umar:
Once I went upstairs in Hafsa's house and saw the Prophet (ﷺ) answering the call of nature with his back towards the Qibla and facing Sham. (PT)
Reference (PT): Sahih al-Bukhari 3102 (PT)
In-book reference (PT): Book 57, Hadith 11 (PT)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 53, Hadith 334 (PT)