exodus 29:36 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. - Free Bible Online

      Ex 29:36, 37. CONSECRATION OF THE ALTAR.

      36. and thou shalt cleanse the altar--The phrase, "when thou hast made an atonement for it," should be, upon it; and the purport of the direction is, that during all the time they were engaged as above from day to day in offering the appointed sacrifices, the greatest care was to be taken to keep the altar properly cleansed--to remove the ashes, and sprinkle it with the prescribed unction that, at the conclusion of the whole ceremonial, the altar itself should be consecrated as much as the ministers who were to officiate at it (Mt 23:19). It was thenceforth associated with the services of religion.

JFB.