Water; Its Purity and Impurity
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 2
وأَتَى أَهْلُ اَلْبَادِيَةِ رَسُولَ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ فَقَالُوا يَا رَسُولَ اَللَّهِ إِنَّ حِيَاضَنَا هَذِهِ تَرِدُهَا اَلسِّبَاعُ وَ اَلْكِلاَبُ وَ اَلْبَهَائِمُ فَقَالَ لَهُمْ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ «لَهَا مَا أَخَذَتْ أَفْوَاهُهَا وَ لَكُمْ سَائِرُ ذَلِكَ.
The people of the desert came to the Messenger of Allah صلى الله عليه وعلى آله وسلم and said: "O’ Messenger of Allah صلى الله عليه وعلى آله وسلم, our water reservoirs are frequented by wild animals, dogs, and livestock." He صلى الله عليه وعلى آله وسلم said to them: "What they take with their mouths is for them, and the rest is for you”.
- Ṣaḥīḥ al-Faqīh