Hebrews 1:3

who being the brightness of his glory and the express image of his substance, and sustaining 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 once a year only the chief priest [enters], not without blood, which he offers for his errors and those of the people,

Hebrews 9:22-23

And almost all things, according to the law, are purified with blood, and without the pouring out of blood there is no forgiveness.

Hebrews 9:25

not that he may often present himself, as the chief priest enters into the sanctuary once a year with the blood of another [being];

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 the brightness of his glory and the express image of his substance, and sustaining 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 once a year only the chief priest [enters], not without blood, which he offers for his errors and those of the people,