Ezekiel 45:18-20

18This is what the Almighty Lord says: Each year, on the first day of the first month, you must offer a young bull as a sacrifice. It must not have anything wrong with it. This sacrifice will cause the temple to be clean.

19The priest will take some of the blood of this sin offering and he will put it on the posts of the temple doors. He must also put some of the blood on the four corners on the top of the altar. He must also put some blood on the gate posts at the entrance to the inside yard of the temple.

20You must also do this on the seventh day of the first month. That will cause me to forgive anyone who has done a wrong thing by mistake. Perhaps they did not know that it was a sin. In this way you will make the temple a clean place for me.