Leviticus 17:8-12

8“Say to them: Anyone from the house of Israel or from the aliens who reside among them who offers a burnt offering or a sacrifice

9but does not bring it to the entrance to the tent of meeting to sacrifice it to the Lord, that person is to be cut off from his people.

10“Anyone from the house of Israel or from the aliens who reside among them who eats any blood, I will turn against that person who eats blood and cut him off from his people.

11For the life of a creature is in the blood, and I have appointed it to you to make atonement on the altar for your lives, since it is the lifeblood that makes atonement.

12Therefore I say to the Israelites: None of you and no alien who resides among you may eat blood.