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 1ـ عَلِيُّ بْنُ إِبْرَاهِي٠َّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنْ عَبْدِ الله بْنِ سِنَانٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠) عَنِ الصَّلاَةِ فِي الْبِيَعِ وَالْكَنَائِسِ فَقَالَ رُشَّ وَصَلِّ قَالَ وَسَأَلْتُهُ عَنْ بُيُوتِ الْ٠َجُوسِ فَقَالَ رُشَّهَا وَصَلِّ.

He (the Imam) said, ‘Sprinkle and perform Salah (prayer).”’ صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/288))