John 6:58-62

This is that bread which came down from heaven: not as your fathers did eat manna, and are dead: he that eateth of 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 had heard this, said, This is an hard saying; who can hear it?

When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you?

What and if ye shall see the Son of man ascend up where he was before?