For the life of the flesh is in the blood, and I have given it for you on the altar to make atonement for your souls, for it is the blood that makes atonement by the life.
This verse has 2 meanings. In the past, the Israelites need to sacrifice animals and their blood were used for atonement of the Israelites sins so they can live. Another meaning is the blood is referring to Jesus blood. This was prophecy about Jesus blood that can atone us of our sins so we can have life, eternal life. This prophecy has already fulfilled about 2000 years ago when Jesus died at the cross for our sins. It is His blood that brings life to the body.