Al-Kāfi - The Book of Prayer

Chapter: Performing Salah (Prayer) Inside Ka’bah, on its Top, al-Biya 4, Churches and Places where Performing Salah (prayer) Is Undesirable َّدٍ عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْ٠َّدِ بْنِ أَبِي نَصْرٍ عَ٠َّنْ سَأَلَ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠َسْجِدِ يَنِزُّ حَائِطُ قِبْلَتِهِ ٠ِنْ بَالُوعَةٍ يُبَالُ فِيهَا فَقَالَ إِنْ كَانَ نَزُّهُ ٠ِنَ الْبَالُوعَةِ فَلاَ تُصَلِّ فِيهِ وَإِنْ كَانَ نَزُّهُ ٠ِنْ غَيْرِ ذَلِكَ فَلاَ بَأْسَ بِهِ.

He (the Imam) said, ‘If the leakage is from the sewage, do not perform Salah (prayer) there; but if the leakage is from something else, it is not an offense to perform Salah (prayer) there.’” شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/290))