John 6:60-66

⁶⁰Many therefore of his disciples, when they had heard this, said, This is a hard saying; who can hear it?

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

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

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

⁶⁴But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him.

⁶⁵And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.

⁶⁶From that time many of his disciples went back, and walked no more with him.