'Impurity' in the Bible
Then the priest will make her swear an oath, and he will say to the woman, "If a man has not slept with you, and if you have not had an impurity affair under your husband, go unpunished from the waters of bitterness that brings this curse.
A clean man will gather the ashes of the heifer, and he will put [them] in a clean {place outside the camp}; it will be for the community of the {Israelites} as a requirement for waters of impurity; it [is] a purification [offering].
Anyone who touches a corpse, the person of a human being who died, and does not purify himself, defiles the tabernacle of Yahweh, and that person will be cut off from Israel because the waters of impurity were not sprinkled on him. He will still be unclean, and uncleanness [is] on him.
But the man who is unclean and does not purify himself, that person will be cut off from the midst of the assembly because he defiled the sanctuary of Yahweh; the water of impurity was not sprinkled on him; he [is] unclean.
" 'It will be an eternal decree for them. The one who spatters the waters of impurity will wash his garments, and the one who touches the waters of impurity will be unclean until the evening.
everything that will go through the fire--you will pass through the fire, and it will be clean, and only in waters of impurity will it be purified. Whatever does not go into the fire you will pass through the waters.