'Cleanse the Altar' in the Bible

And thou shalt offer every day a bullock for a sin offering for atonement: and thou shalt cleanse the altar, when thou hast made an atonement for it, and thou shalt anoint it, to sanctify it.

And they shall cleanse the altar of the ashes, and spread a purple cloth thereon;

And on the second day thou shalt offer a kid of the goats without blemish for a sin offering; and they shall cleanse the altar, as they did cleanse it with the bullock.

Seven days shall they reconcile and cleanse the altar, and offer upon it.