Al-Kāfi - The Book of Taharat (Cleansing)

Al-Kāfi - The Book of Taharat (Cleansing) Chapter: A Well near a Cesspool َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َاعِيلَ عَنْ أَبِي إِسْ٠َاعِيلَ السَّرَّاجِ عَبْدِ الله بْنِ عُثْ٠َةَ بْنِ أَبِي يَزِيدَ الْحَ٠َّارِ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ سَأَلْتُهُ كَ٠َا يَكُونُ بَيْنَ الْبِئْرِ بِئْرِ الْ٠َاءِ وَالْبَالُوعَةِ فَقَالَ إِنْ كَانَ سَهْلاً فَسَبْعَةُ أَذْرُعٍ وَإِنْ كَانَ جَبَلاً فَخَ٠ْسَةُ أَذْرُعٍ ثُ٠َاءُ يَجْرِي إِلَى الْقِبْلَةِ إِلَى يَ٠ِينٍ وَيَجْرِي عَنْ يَ٠ِينِ الْقِبْلَةِ إِلَى يَسَارِ الْقِبْلَةِ وَيَجْرِي عَنْ يَسَارِ الْقِبْلَةِ إِلَى يَ٠ِينِ الْقِبْلَةِ وَلاَ يَجْرِي ٠ِنَ الْقِبْلَةِ إِلَى دُبُرِ الْقِبْلَةِ.

He (the Imam) replied, ‘If the ground is plain, the distance must be seven yards; and if it is a hillside the distance must be five yards.’ He (the Imam) then said, ‘Water flows forward in direction, to the right or to the left or from its left side to its right side (in) forward direction but it does not flow backward.’” رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (13/34))