John 6:60-66 NIV

[60] On hearing it, many of his disciples said, “This is a hard teaching. Who can accept it?” [61] Aware that his disciples were grumbling about this, Jesus said to them, “Does this offend you? [62] Then what if you see the Son of Man ascend to where he was before! [63] The Spirit gives life; the flesh counts for nothing. The words I have spoken to you—they are full of the Spirit and life. [64] Yet there are some of you who do not believe.” For Jesus had known from the beginning which of them did not believe and who would betray him. [65] He went on to say, “This is why I told you that no one can come to me unless the Father has enabled them.” [66] From this time many of his disciples turned back and no longer followed him.