Leviticus 17:11

17:11 for the life of every living thing is in the blood. So I myself have assigned it to you on the altar to make atonement for your lives, for the blood makes atonement by means of the life.

Leviticus 17:14

17:14 for the life of all flesh is its blood. So I have said to the Israelites: You must not eat the blood of any living thing because the life of every living thing is its blood – all who eat it will be cut off.