Leviticus 16:18-20

New Century Version

¹⁸ Afterward he will go out to the altar that is before the Lord and will make it ready for service to the Lord. Aaron will take some of the bull’s blood and some of the goat’s blood and put it on the corners of the altar on all sides. ¹⁹ Then, with his finger, he will sprinkle some of the blood on the altar seven times to make the altar holy for the Lord and clean from all the sins of the Israelites.

²⁰ “When Aaron has finished making the Most Holy Place, the Meeting Tent, and the altar ready for service to the Lord, he will offer the living goat.