Leviticus 17:14

For it is the life of all flesh; the blood of it is the life thereof. Therefore I said unto the children of Israel, Ye shall eat the blood of no manner of flesh; for the life of all flesh is the blood thereof; whosoever eateth it shall be cut off. He that ate blood or permitted dogs or other animals to eat blood which he had shed, desecrated that which the Lord had set apart as consecrated to Himself, and thus became guilty.