Leviticus 16:33-34

Expanded Bible

³³ and make ·the Most Holy Place, the Meeting Tent, and the altar ready for service to the Lord [^Latonement for the Most Holy Place, the Meeting Tent, and the altar]. He must ·also remove the sins of the priests and all the people of Israel so they will belong to the Lord [^Lmake atonement for the priests and the people of Israel]. ³⁴ That ·law [statute; ordinance; requirement] for removing the sins of the Israelites ·so they will belong to the Lord [^Land make atonement] will continue forever. You will do these things once a year.”

So they did the things the Lord had commanded Moses.