'Purify The Altar' in the Bible

Sacrifice a bull as a sin offering each day for atonement. Purify the altar when you make atonement for it, and anoint it in order to consecrate it.

And he will slaughter; and Moses will take the blood and give upon the horns of the altar round about with his finger, and he will purify the altar, and he will sour out the blood at the foundation of the altar, and he will consecrate it to expiate upon it

“You must take some of its blood and apply it to the four horns of the altar, the four corners of the ledge, and all around the rim. In this way you will purify the altar and make atonement for it.

And on the second day you must offer a he-goat without defect as sin offering, and they must purify the altar {like} they purified with the bull.

Seven days they purify the altar, and have cleansed it, and filled their hand.