Leviticus 16:33-34

The Message

³³ He purges the Holy of Holies by making atonement;

He purges the Tent of Meeting and the Altar by making atonement;

He makes atonement for the priests and all the congregation.

³⁴ “This is a perpetual ordinance for you: Once a year atonement is to be made for all the sins of the People of Israel.”

And Aaron did it, just as God commanded Moses.