Leviticus 16:32-34

New International Version

³² The priest who is anointed and ordained^(A) to succeed his father as high priest is to make atonement. He is to put on the sacred linen garments^{(B) 33} and make atonement for the Most Holy Place, for the tent of meeting and the altar, and for the priests and all the members of the community.^(C)

³⁴ “This is to be a lasting ordinance^(D) for you: Atonement is to be made once a year^(E) for all the sins of the Israelites.”

And it was done, as the Lord commanded Moses.