Bible Verses About The Altar of Burnt Offering: Cleansed and purified with blood

Every day you shall offer the bull of sin offering for atonement: and you shall cleanse the altar, when you make atonement for it; and you shall anoint it, to sanctify it.

Seven days you shall make atonement for the altar, and sanctify it: and the altar shall be most holy; whatever touches the altar shall be holy.