'Purify' in the Bible

"Take the Levites from the midst of the {Israelites} and purify them.

So you will do to them, to purify them: sprinkle on them waters of purification, and {they will shave their whole body} and wash their garments.

And after this the Levites will come to serve [at] the tent of assembly, and you will purify them, and you {will offer} them [as] a wave offering.

And the Levites purified themselves, and they washed their garments, and {Aaron offered them} [as] a wave offering {before Yahweh}; and Aaron made atonement for them to purify them.

He will purify himself on the third day, and on the seventh day he will be clean. If he does not purify himself on the third day, he will not be clean on the seventh day.

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.

The clean [person] will spatter the unclean on the third day and on the seventh day; and on the seventh day he will purify him, and he will wash his garments; he will bathe in the waters, and in the evening he will be clean.

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.

And you, camp outside the camp seven days; all who killed a person and all who touched the slain purify yourselves on the third day and on the seventh day, you and your captives.

You will purify yourselves and every garment and every object of hide and all the work of goats' hair, and every object of wood."