Aaron is to make atonement on its horns once in the year with some of the blood of the sin offering for atonement; once in the year he is to make atonement on it throughout your generations. It is most holy to the Lord.”
This is to be a perpetual statute for you to make atonement for the Israelites for all their sins once a year.” So he did just as the Lord had commanded Moses.
But only the high priest enters once a year into the inner tent, and not without blood that he offers for himself and for the sins of the people committed in ignorance.