John 6:62-65

⁶²Therefore if ye see man’s Son ascending or going up, where he was before?

⁶³It is the spirit that quickeneth, the flesh profiteth nothing; the words that I have spoken to you, be spirit and life.

⁶⁴But there be some of you that believe not. For Jesus knew from the beginning, which were believing, and who was to betray him.

⁶⁵And he said, Therefore I said to you, that no man may come to me, but it were given to him of my Father.