John 6:27-29, 57

Work not for the food which perisheth, but for the food which abideth unto eternal life, which the Son of man shall give unto you: for him the Father, even God, hath sealed. They said therefore unto him, What must we do, that we may work the works of God? Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

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.