However, there was one thing that Jehovah commanded them not to eat: “Only flesh with its life—its blood—you must not eat.”—Genesis 1:29; 9:3, 4.
... 17. In Israel, what was the only use of blood that Jehovah allowed?
17 In the Law that God gave to Moses, Jehovah told the Israelites: “The life of the flesh is in the blood, and I myself have given it on the altar for you to make atonement [or, ask for forgiveness] for yourselves, because it is the blood that makes atonement.” (Leviticus 17:11)