Water; Its Purity and Impurity
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 2
وَ سَأَلَ مُحَمَّدُ بْنُ مُسْلِمٍ أَبَا جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ عَنِ اَلْبِئْرِ تَقَعُ فِيهَا اَلْمَيْتَةُ فَقَالَ «إِنْ كَانَ لَهَا رِيحٌ نُزِحَ مِنْهَا عِشْرُونَ دَلْواً.
Muhammad ibn Muslim asked Imam Muhammad ibn Ali Al-Baqir عليه السلام about a dead animal that falls into a well. Imam عليه السلام said: "If it has an odor, twenty buckets should be drawn from it."
- Ṣaḥīḥ al-Faqīh