'Cleansing' in the Bible

And if any man die very suddenly by him, and he hath defiled the head of his consecration; then he shall shave his head in the day of his cleansing, on the seventh day shall he shave it.

Thus you shall do to them, for their cleansing: sprinkle purifying water on them, and let them use a razor over their whole body and wash their clothes, and they will be clean.

And a clean man hath gathered the ashes of the cow, and hath placed at the outside of the camp, in a clean place, and it hath become to the company of the sons of Israel a charge for waters of separation -- it is a cleansing;

and they have taken for the unclean person of the ashes of the burning of the cleansing, and he hath put upon it running water unto a vessel;