John 6:57-60

As the living Father sent me, and I live because of the Father; so he that eateth me, he also shall live because of me. This is the bread which came down out of heaven: not as the fathers ate, and died; he that eateth this bread shall live for ever. These things said he in the synagogue, as he taught in Capernaum. Many therefore of his disciples, when they heard this, said, This is a hard saying; who can hear it?