John 6:63-65

63The Spirit gives life; the flesh counts for nothing. The words I have spoken to you—they are full of the Spirit and life.

64Yet 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.

65He went on to say, “This is why I told you that no one can come to me unless the Father has enabled them.”