John 13:11

(For he knew the one who would betray him; because of this he said, "Not all [of you] are clean.")

John 2:25

and because he did not {need} anyone {to testify} about man, for he himself knew what was in man.

Matthew 26:24-25

The Son of Man is going just as it is written about him, but woe to that man by whom the Son of Man is betrayed! It would be better for him if that man had not been born."

John 6:64-71

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 it was who would betray him.)

John 13:2

And [as] a dinner was taking place, [when] the devil had already put into the heart of Judas [son] of Simon Iscariot that he should betray him,

John 13:18

"I am not speaking about all of you. I know whom I have chosen, but in order that the scripture would be fulfilled, 'The one who eats my bread has lifted up his heel against me.'

John 13:21

[When he] had said these [things], Jesus was troubled in spirit and testified and said, "Truly, truly I say to you that one of you will betray me."

John 13:26

Jesus replied, "It is he to whom I dip the piece of bread and give [it] to him." Then [after] dipping the piece of bread, he gave [it] to Judas [son] of Simon Iscariot.

John 17:12

When I was with them, I kept them in your name, which you have given to me, and guarded [them], and none of them has perished except the son of destruction, in order that the scripture would be fulfilled.

Treasury of Scripture Knowledge

Summary

For he knew who should betray him; therefore said he, Ye are not all clean.

Bible References

General references

John 13:18
"I am not speaking about all of you. I know whom I have chosen, but in order that the scripture would be fulfilled, 'The one who eats my bread has lifted up his heel against me.'
John 2:25
and because he did not {need} anyone {to testify} about man, for he himself knew what was in man.
John 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 it was who would betray him.)
John 17:12
When I was with them, I kept them in your name, which you have given to me, and guarded [them], and none of them has perished except the son of destruction, in order that the scripture would be fulfilled.
Matthew 26:24
The Son of Man is going just as it is written about him, but woe to that man by whom the Son of Man is betrayed! It would be better for him if that man had not been born."