Leviticus 16:34

And this shall be to you a perpetual statute to make atonement for the children of Israel for all their sins: it shall be done once in the year, as the Lord commanded Moses.

And this shall be an everlasting statute unto you, to make an atonement for the children of Israel for all their sins once a year. And he did as the Lord commanded Moses.

“This shall be an everlasting statute for you, to make atonement for the children of Israel once in the year because of all their sins.” It was done as Yahweh commanded Moses.