Leviticus 16:33-34

New International Reader's Version

³³ He must make the Most Holy Room, the tent of meeting and the altar pure. And he must pay for the sin of the priests and all the members of the community.

³⁴ “Here is a law for you that will last for all time to come. Once a year you must pay for all the sin of the Israelites.”

So it was done, just as the Lord commanded Moses.