1. Purification

١۔ كِتَابُ الطَّهَارَةِ

1.18 [Machine] The license in that in the houses

١۔١٨ الرُّخْصَةُ فِي ذَلِكَ فِي الْبُيُوتِ

nasai-kubra:22Qutaybah b. Saʿīd > Mālik > Yaḥyá b. Saʿīd > Muḥammad b. Yaḥyá b. Ḥabbān from his uncle Wāsiʿ b. Ḥabbān > ʿAbdullāh b. ʿUmar

I ascended the roof of the house and saw the Apostle of Allaah ( sal Allaahu alayhi wa sallam) sitting on two bricks facing Jerusalem (Bait al-Maqdis) for relieving himself. (Using translation from Abū Dāʾūd 12)  

الكبرى للنسائي:٢٢أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ عَنْ يَحْيَى بْنِ سَعِيدٍ عَنْ مُحَمَّدِ بْنِ يَحْيَى بْنِ حَبَّانَ عَنْ عَمِّهِ وَاسِعِ بْنِ حَبَّانَ عَنْ عَبْدِ اللهِ بْنِ عُمَرَ قَالَ

«لَقَدِ ارْتَقَيْتُ عَلَى ظَهَرِ بَيْتِنَا فَرَأَيْتُ رَسُولَ اللهِ ﷺ عَلَى لَبِنَتَيْنِ مُسْتَقْبِلَ بَيْتِ الْمَقْدِسِ لِحَاجَتِهِ»