Al-Kāfi - Volume 3 > A Well near a Cesspool
Hadith #1

1ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنِ الْحَسَنِ بْنِ رِبَاطٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ سَأَلْتُ عَنِ الْبَالُوعَةِ تَكُونُ فَوْقَ الْبِئْرِ قَالَ إِذَا كَانَتْ فَوْقَ الْبِئْرِ فَسَبْعَةُ أَذْرُعٍ وَإِذَا كَانَتْ أَسْفَلَ مِنَ الْبِئْرِ فَخَمْسَةُ أَذْرُعٍ مِنْ كُلِّ نَاحِيَةٍ وَذَلِكَ كَثِيرٌ.

1. A number of our people have narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from al-Hassan ibn Ribat who has said the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about a cesspool which is above a well. He (the Imam) said, ‘If it is above the well, the distance in between must be seven yards, but if it is below the well, the distance must be five yards from all sides, and that is a large area.”