Ezekiel 45:18-20

18This is what the Lord GOD says: ‘On the first day of the first month you are to take a young bull without blemish and purify the sanctuary. 19And the priest is to take some of the blood from the sin offering and put it on the doorposts of the temple, on the four corners of the ledge of the altar, and on the gateposts of the inner court. 20You must do the same thing on the seventh day of the month for anyone who strays unintentionally or in ignorance. In this way you will make atonement for the temple.