Once a year Aaron shall make atonement on its horns. This annual atonement must be made with the blood of the atoning sin offering for the generations to come. It is most holy to the Lord.”
“This is to be a lasting ordinance for you: Atonement is to be made once a year for all the sins of the Israelites.” And it was done, as the Lord commanded Moses.
But only the high priest entered the inner room, and that only once a year, and never without blood, which he offered for himself and for the sins the people had committed in ignorance.