John 6:61-63

King James Version

⁶¹ When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you?

⁶² What and if ye shall see the Son of man ascend up where he was before?

⁶³ It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.