Ezekiel 45:18-20

18‘Thus says the Lord God, “In the first month, on the first of the month, you shall take a young bull without blemish and cleanse the sanctuary (from sin).

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

20You shall do this on the seventh [day] of the month for everyone who goes astray [and sins through error or ignorance] and for him who is naive; so shall you make atonement for the temple (house).