John 6:65-71

65 And he said, This is why I said to you, No man is able to come to me if he is not given the power to do so by the Father.

66 Because of what he said, a number of the disciples went back and would no longer go with him.

67 So Jesus said to the twelve, Have you a desire to go away?

68 Then Simon Peter gave this answer: Lord, to whom are we to go? you have the words of eternal life;

69 And we have faith and are certain that you are the Holy One of God.

70 Then Jesus said, Did I not make a selection of you, the twelve, and one of you is a son of the Evil One?

71 He was talking of Judas, the son of Simon Iscariot. It was he who was to be false to Jesus--one of the twelve.