Leviticus 17:10-16

“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. For 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.  Therefore I say to the Israelites: None of you and no alien who resides among you may eat blood. “Any Israelite or alien residing among them, who hunts  down a wild animal or bird that may be eaten must drain its blood  and cover it with dirt. Since the life of every creature is its blood, I have told the Israelites: You are not to eat the blood of any creature,  because the life of every creature is its blood; whoever eats it must be cut off. “Every person, whether the native or the resident alien,  who eats an animal that died a natural death or was mauled by wild beasts  is to wash his clothes and bathe with water, and he will remain unclean until evening; then he will be clean. But if he does not wash his clothes and bathe himself, he will bear his iniquity.”