Treasury of Scripture Knowledge

Summary

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.

Bible References

Once a year

Hebrews 9:7
the high priest only enter'd, and that but once every year, when he carried the blood, which he offered for himself, and for the errors of the people.
Hebrews 10:3
whereas their annual sacrifices were accompanied with an anniversary commemoration of their sins.