Ezekiel 45:19-20

New International Version

¹⁹ The 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^(A) of the altar^(B) and on the gateposts of the inner court. ²⁰ You are to do the same on the seventh day of the month for anyone who sins unintentionally^(C) or through ignorance; so you are to make atonement for the temple.