'Cleanse the Altar' in the Bible

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

And on the second day you shall 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.