Leviticus 16:18
18 Then he shall go out to the altar that is vbefore the Lord and wmake atonement for it, and shall take some of the blood of the bull and some of the blood of the goat, and put it on the horns of the altar all around.
Leviticus 23:27
27 “Now non the tenth day of this seventh month is the Day of Atonement. It shall be for you a time of holy convocation, and you shall afflict yourselves1 and present a food offering to the Lord.