Hebrews 1:3

Who, being an effulgence of His glory and an exact expression of His substance, and upholding all things by the word of His power, having made a purification of sins, sat down on the right hand of the Majesty on high;

Hebrews 9:7

but into the second, the high priest alone, once a year, not without blood, which he offers for himself and for the ignorances of the people;

Hebrews 9:22-23

And nearly all things are cleansed, according to the law, with blood; and apart from shedding of blood there is no remission.

Hebrews 9:25

nor yet, that He should many times offer Himself, as the high priest enters into the Holies every year with blood 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
Who, being an effulgence of His glory and an exact expression of His substance, and upholding all things by the word of His power, having made a purification of sins, sat down on the right hand of the Majesty on high;
Hebrews 9:7
but into the second, the high priest alone, once a year, not without blood, which he offers for himself and for the ignorances of the people;