John 6:54-63

He that eateth my flesh and drinketh my blood hath eternal life; and I will raise him up at the last day. For my flesh is meat indeed, and my blood is drink indeed. He that eateth my flesh and drinketh my blood abideth in me, and I in him. 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? But Jesus knowing in himself that his disciples murmured at this, said unto them, Doth this cause you to stumble? What then if ye should behold the Son of man ascending where he was before? It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, and are life.