Exodus 30:10
And Aaron shall make an atonement on 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 on it throughout your generations: it is most holy to the LORD.
Torrey's Topical Textbook—AKJV

Leviticus 17:11
For the life of the flesh is in the blood: and I have given it to you on the altar to make an atonement for your souls: for it is the blood that makes an atonement for the soul.
Torrey's Topical Textbook—AKJV