John 6:64-66

New Revised Standard Version Catholic Edition

⁶⁴ But among you there are some who do not believe.” For Jesus knew from the first who were the ones that did not believe, and who was the one that would betray him. ⁶⁵ And he said, “For this reason I have told you that no one can come to me unless it is granted by the Father.”

⁶⁶ Because of this many of his disciples turned back and no longer went about with him.