One criterion reported from Abu Hanifa assesses the movement produced by bathing, without deliberately creating exaggerated force.
The explanation given is that bathing in a pond was a more pressing practical need than wudu, which could commonly be performed at home.
The test is a way of estimating the pond’s extent, not an independent ritual requirement.
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Impurity in Stagnant and Running Water, Large Ponds, and Aquatic Creatures
One criterion reported from Abu Hanifa assesses the movement produced by bathing, without deliberately creating exaggerated force.
The explanation given is that bathing in a pond was a more pressing practical need than wudu, which could commonly be performed at home.
The test is a way of estimating the pond’s extent, not an independent ritual requirement.