John 6:65

63 The Spirit gives life; the flesh profits nothing. The words I have spoken to you are spirit and they are life.

64 However, 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.)

Then Jesus said, “This is why I told you that no one can come to Me unless the Father has granted it to him.”

66 From that time on many of His disciples turned back and no longer walked with Him.

67 So Jesus asked the Twelve, “Do you want to leave too?”

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
Then Jesus said, “This is why I told you that no one can come to Me unless the Father has granted it to him.”
KJV
And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.
WEB
He said, “For this cause I have said to you that no one can come to me, unless it is given to him by my Father.”
ASV
And he said, For this cause have I said unto you, that no man can come unto me, except it be given unto him of the Father.
DARBY
And he said, Therefore said I unto you, that no one can come to me unless it be given to him from the Father.
BLB
And He was saying, “Because of this, I have said to you⁺ that no one is able to come to Me unless it shall have been given to him from the Father.”
ÅB
Og han sa: Det var derfor jeg sa dere at ingen kan komme til meg uten at det er gitt ham av Faren.
OTB
Han fortsatte: "Dette er grunnen til at jeg sa dere at ingen kan komme til meg uten at Faderen har gjort det mulig for dem."
B1930
Og han sa: Det var derfor jeg sa eder at ingen kan komme til mig uten at det er gitt ham av Faderen.

Study notes (Tyndale)

Original text and word study

Cross references