Leviticus 16:18

16:18 “Then he is to go out to the altar which is before the Lord and make atonement for it. He is to take some of the blood of the bull and some of the blood of the goat, and put it all around on the horns of the altar.

Leviticus 16:29-30

Review of the Day of Atonement

16:29 “This is to be a perpetual statute for you. In the seventh month, on the tenth day of the month, you must humble yourselves and do no work of any kind, both the native citizen and the foreigner who resides in your midst, 16:30 for on this day atonement is to be made for you to cleanse you from all your sins; you must be clean before the Lord.