And He said, "Therefore I have said to you that no one can come to Me unless it has been granted to him by My Father."
John 6:65
Surrounding context
6:64 But there are some of you who do not believe." For Jesus knew from the beginning who they were who did not believe, and who would betray Him.
6:65 And He said, "Therefore I have said to you that no one can come to Me unless it has been granted to him by My Father."
6:66 From that time many of His disciples went back and walked with Him no more.