If the water is two pitchers, it will bear no impurity
عَن عَبْدِ اللَّهِ بْنِ عُمَرَ رضي الله عنهما قَالَ: سُئِلَ رَسُولُ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ عَنِ الْمَاءِ وَمَا يَنُوبُهُ مِنَ الدَّوَابِّ وَالسِّبَاعِ، فَقَالَ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «إِذَا كَانَ الْمَاءُ قُلَّتَيْنِ لَمْ يَحْمِلِ الْخَبَثَ».
Explanation
The Prophet (may Allah's peace and blessings be upon him) was asked about the ruling on the purity of the water that is frequented by animals and beasts of prey to drink from it and the like. He (may Allah's peace and blessings be upon him) said: If the amount of water can fill two big pitchers, i.e., 210 liters, then it is a big amount of water that does not become impure unless one of its three characteristics, namely its color, taste, and smell, is changed because of some impurity.
Source
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