Leviticus 16:33-34

Good News Translation

³³ and perform the ritual to purify the Most Holy Place, the rest of the Tent of the Lord's presence, the altar, the priests, and all the people of the community. ³⁴ These regulations are to be observed for all time to come. This ritual must be performed once a year to purify the people of Israel from all their sins.

So Moses^[a] did as the Lord had commanded.