Ezekiel 45:18-20

18“ ‘This is what the Sovereign Lord says: In the first month on the first day you are to take a young bull without defect and purify the sanctuary.

19The priest is to take some of the blood of the sin offering and put it on the doorposts of the temple, on the four corners of the upper ledge of the altar and on the gateposts of the inner court.

20You are to do the same on the seventh day of the month for anyone who sins unintentionally or through ignorance; so you are to make atonement for the temple.