Leviticus 17:10-16 - Eating Blood And Carcasses Prohibited
10 And if any man of Israel, or any other living among them, takes any sort of blood for food, my wrath will be turned against that man and he will be cut off from among his people. 11 For the life of the flesh is in its blood; and I have given it to you on the altar to take away your sin: for it is the blood which makes free from sin because of the life in it. 12 For this reason I have said to the children of Israel, No man among you, or any others living with you, may take blood as food.
13 And any man of Israel, or any other living among them, who gets with his bow any beast or bird used for food, is to see that its blood is covered with earth. 14 For the blood is the life of all flesh: and so I have said to the children of Israel, You may not take any sort of blood as food, and any man who does so will be cut of.
15 And anyone who takes as food anything which has come to a natural end, or anything which has been put to death by beasts, if he is one of you by birth, or of another nation, will have to have his clothing washed and his body bathed in water and be unclean till evening, and then he will be clean. 16 But if his clothing is not washed and his body bathed, his sin will be on him.