John 6:61-63

American Standard Version

⁶¹ But Jesus knowing in himself that his disciples murmured at this, said unto them, Doth this cause you to stumble? ⁶² What then if ye should behold the Son of man ascending where he was before? ⁶³ It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, and are life.