Leviticus 6:18

6:18 Every male among the sons of Aaron may eat it. It is a perpetual allotted portion throughout your generations from the gifts of the Lord. Anyone who touches these gifts must be holy.’”

Leviticus 17:11

17:11 for the life of every living thing is in the blood. So I myself have assigned it to you on the altar to make atonement for your lives, for the blood makes atonement by means of the life.