Hebrews 1:3

He is the reflection of God's glory and the perfect representation of His being, and continues to uphold the universe by His mighty word. After He had procured man's purification from sins, He took His seat at the right hand of God's majesty,

Hebrews 9:7

but into the second or inner part nobody but the high priest may go, and he only once a year, and never without blood which he offers for himself and for the sins committed in ignorance by the people.

Hebrews 9:22-23

In fact, under the law, almost everything is purified with blood, and without the shedding of blood no forgiveness is granted.

Hebrews 9:25

And He does not enter to offer Himself over and over again, as the high priest enters the sanctuary year after year with blood that is not his own;

Treasury of Scripture Knowledge

Summary

And Aaron shall make an atonement upon the horns of it once in a year with the blood of the sin offering of atonements: once in the year shall he make atonement upon it throughout your generations: it is most holy unto the LORD.

Bible References

Aaron

Hebrews 1:3
He is the reflection of God's glory and the perfect representation of His being, and continues to uphold the universe by His mighty word. After He had procured man's purification from sins, He took His seat at the right hand of God's majesty,
Hebrews 9:7
but into the second or inner part nobody but the high priest may go, and he only once a year, and never without blood which he offers for himself and for the sins committed in ignorance by the people.