Leviticus 17:10-12

10 “ ‘I will set my face against any Israelite or any foreigner residing among them who eats blood, and I will cut them off from the people.
11 For the life of a creature is in the blood, and I have given it to you to make atonement for yourselves on the altar; it is the blood that makes atonement for one’s life.a
12 Therefore I say to the Israelites, “None of you may eat blood, nor may any foreigner residing among you eat blood.”