'Purifying' in the Bible

So Moses slaughtered it, took the blood, and applied some of it at the horns of the altar and around it with his fingers, thus purifying the altar. Then he poured the blood at the base of the altar, thereby sanctifying it as a means to make atonement with it.

This is what you are to do for them in order to purify them: Sprinkle purifying water over them, have them shave their skin, and then have them wash their garments, and they will be purified.

For a seven day period they are to make atonement for the altar, purifying it and consecrating it.

And I will bring that surviving third through, testing them as if through fire, purifying them like silver, assaying them like gold. They will call on my name, and I will answer them. I will say, "This is my people,' and they will say, "The LORD is my God.'"

he will sit refining and purifying silver, purifying the descendants of Levi, refining them like gold and silver. Then they'll bring a righteous offering to the LORD.