John 6:59

He who eats my flesh and drinks my blood lives in me, and I in him.

As the living Father sent me, and I live because of the Father, so he who feeds on me will also live because of me.

This is the bread which came down out of heaven—not as our fathers ate the manna and died. He who eats this bread will live forever.”

Therefore many of his disciples, when they heard this, said, “This is a hard saying! Who can listen to it?”

But Jesus knowing in himself that his disciples murmured at this, said to them, “Does this cause you to stumble?

Then what if you would see the Son of Man ascending to where he was before?