Ezekiel 45:18-20

18"Thus says the Lord God: In the first month, on the first day of the month, you shall take a bull from the herd without blemish, and purify the sanctuary.

19The priest shall take some of the blood of the sin offering and put it on the doorposts of the temple, the four corners of the ledge of the altar, and the posts of the gate of the inner court.

20You shall do the same on the seventh day of the month for anyone who has sinned through error or ignorance; so you shall make atonement for the temple.