John 6:25-35, 60-61, 66-69

And when they found him on the other side of the sea, they said unto him, Rabbi, when camest thou hither? Jesus answered them and said, Verily, verily, I say unto you, Ye seek me, not because ye saw signs, but because ye ate of the loaves, and were filled. 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. They said therefore unto him, What then doest thou for a sign, that we may see, and believe thee? what workest thou? Our fathers ate the manna in the wilderness; as it is written, He gave them bread out of heaven to eat. Jesus therefore said unto them, Verily, verily, I say unto you, It was not Moses that gave you the bread out of heaven; but my Father giveth you the true bread out of heaven. For the bread of God is that which cometh down out of heaven, and giveth life unto the world. They said therefore unto him, Lord, evermore give us this bread. Jesus said unto them, I am the bread of life: he that cometh to me shall not hunger, and he that believeth on me shall never thirst.

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?

Upon this many of his disciples went back, and walked no more with him. Jesus said therefore unto the twelve, Would ye also go away? Simon Peter answered him, Lord, to whom shall we go? thou hast the words of eternal life. And we have believed and know that thou art the Holy One of God.