Leviticus 17:14

For the life of the flesh is in the blood. I have given it to you on the altar to make atonement for your souls; for it is the blood that makes atonement by reason of the life.

Therefore I have said to the children of Israel, “No person among you may eat blood, nor may any stranger who lives as a foreigner among you eat blood.”

“‘Whatever man there is of the children of Israel, or of the strangers who live as foreigners among them, who takes in hunting any animal or bird that may be eaten, he shall pour out its blood, and cover it with dust.

“‘Every person that eats what dies of itself, or that which is torn by animals, whether he is native-born or a foreigner, shall wash his clothes, and bathe himself in water, and be unclean until the evening. Then he shall be clean.

But if he doesn’t wash them, or bathe his flesh, then he shall bear his iniquity.’”