John 6:64-66 ESV
But there are some of you who do not believe.” (For Jesus knew from the beginning who those were who did not believe, and who it was who would betray him.) And he said, “This is why I told you that no one can come to me unless it is granted him by the Father.”
After this many of his disciples turned back and no longer walked with him.
ESV: English Standard Version 2016