وَإِذَا وَقَعَتْ فِي الْبِئْرِ نَجَاسَةٌ نُزِحَتْ، وَكَانَ نَزْحُ مَا فِيهَا مِنَ الْمَاءِ طَهَارَةً لَهَا
Translation: If impurity falls into a well, water is to be drawn from it; withdrawing its water is the means of purifying it.
Nazḥ means drawing water out of a well. In the relevant cases, extracting the contaminant alone does not replace the prescribed withdrawal of water.
The subsequent rulings distinguish animals by size and by their condition when found.
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Impurity in Wells and Rules of Drawing Water
وَإِذَا وَقَعَتْ فِي الْبِئْرِ نَجَاسَةٌ نُزِحَتْ، وَكَانَ نَزْحُ مَا فِيهَا مِنَ الْمَاءِ طَهَارَةً لَهَا
Translation: If impurity falls into a well, water is to be drawn from it; withdrawing its water is the means of purifying it.
Nazḥ means drawing water out of a well. In the relevant cases, extracting the contaminant alone does not replace the prescribed withdrawal of water.
The subsequent rulings distinguish animals by size and by their condition when found.