Ruling on the threshold between much and little water and the effect of impurity
Where lies the threshold between much and little water, and does little water become impure on contact even without any change?
Much water is that whose far side does not stir when one side is moved; little water becomes impure on contact with an impurity even without any change.
No distinction is drawn between much and little water: it becomes impure only when its taste, colour, or smell is altered.
Much water is two qullahs or more and becomes impure only through alteration; little water is below that and becomes impure by mere contact.
The dividing line is two qullahs: water reaching it is much and becomes impure only through alteration, while less than that is little and becomes impure by contact.