the case of other impurities, seven washes without soil are sufficient.
A defiled object is not purified by sunlight, wind, mere rubbing, or by transformation—except in the case of wine, for if it turns into vinegar it is deemed pure. Should liquid fat or oil itself become impure, it can never be purified. If the exact place of the impurity1 is unknown, the item must be washed until one is certain that it has been removed.
The urine of a male infant who has not yet eaten solid food is cleansed by sprinkling.
With respect to substances that are neither liquid nor edible, a small quantity of impure blood taken from an animal that is itself pure, as well as the residual trace left after dry cleansing with stones2, is excused.
A human being does not become impure upon death, nor does any creature that has no flowing blood and that originates from something pure3.
The urine, semen, and dung of animals whose flesh is lawful to eat are pure; human semen is pure; so too are a woman’s natural vaginal secretions and the water that remains after a cat—or any creature smaller than a cat—has drunk.
Predatory land animals and birds, the domestic donkey, and the mule produced from it are impure.