John 13:11

For Jesus knew who would betray Him; that is why He said, "Not every one of you is [spiritually] clean."

John 2:25

and He did not need anyone to tell Him about mankind, for He Himself knew what was in the hearts of mankind.

Matthew 26:24-25

The Son of man is going [to die], but it is too bad for that person through whom the Son of man is turned over [to the Jewish leaders]! It would be better for that man if he had not been born."

John 6:64-71

But there are some of you who do not believe [in me]." For Jesus knew from the beginning which ones would not believe [in Him] and which one would turn Him over [i.e., to the Jewish authorities].

John 13:2

The devil had already filled the heart of Judas Iscariot, Simon's son, with the desire to turn Jesus over [i.e., to the Jewish authorities]. During the [Passover] meal,

John 13:18

"I am not talking about all of you; for I know the ones I have chosen [i.e., which of the twelve apostles would be faithful]. But let the Scripture [Psa. 41:9] be fulfilled [that says], 'The person who eats with me has [viciously] turned against me.'

John 13:21

After Jesus said this, He felt disturbed in His spirit and declared, "Truly, truly, I tell you, one of you will turn me over [to the Jewish authorities]."

John 13:26

Jesus answered, "It is the person to whom I give a piece of bread after dipping it [in the sauce bowl]." So, when He had dipped the piece of bread, He took it [out] and gave it to Judas, the son of Simon Iscariot.

John 17:12

I protected them while I was with them by [the power of] your name which you gave me. [See verse 11]. I guarded them so that not one of them was lost except the "son of destruction" [i.e., Judas]. [This was] so that the Scripture would be fulfilled [Psa. 41:9 ?].

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 talking about all of you; for I know the ones I have chosen [i.e., which of the twelve apostles would be faithful]. But let the Scripture [Psa. 41:9] be fulfilled [that says], 'The person who eats with me has [viciously] turned against me.'
John 2:25
and He did not need anyone to tell Him about mankind, for He Himself knew what was in the hearts of mankind.
John 6:64
But there are some of you who do not believe [in me]." For Jesus knew from the beginning which ones would not believe [in Him] and which one would turn Him over [i.e., to the Jewish authorities].
John 17:12
I protected them while I was with them by [the power of] your name which you gave me. [See verse 11]. I guarded them so that not one of them was lost except the "son of destruction" [i.e., Judas]. [This was] so that the Scripture would be fulfilled [Psa. 41:9 ?].
Matthew 26:24
The Son of man is going [to die], but it is too bad for that person through whom the Son of man is turned over [to the Jewish leaders]! It would be better for that man if he had not been born."