John 13:11

11 For he knew who was going to betray him, and that was why he said not every one was clean.

Read John 13:11 Using Other Translations

For he knew who should betray him; therefore said he, Ye are not all clean.
For he knew who was to betray him; that was why he said, "Not all of you are clean."
For Jesus knew who would betray him. That is what he meant when he said, “Not all of you are clean.”

What does John 13:11 mean?

John Gill's Exposition of the Bible
John 13:11

For he knew who should betray him
That is, Jesus, as Beza's ancient copy, and the Syriac and Persic versions read. This he knew from the beginning; not only from the beginning of his ministry, when he chose his twelve apostles, but from the beginning of time, yea, from everlasting; this being fixed by the determinate counsel of God, which he, as the omniscient God, was privy to: he knew what preparations were making, and how things were then working, in order to bring it about; he knew that Satan had already put it into Judas's heart, and that he had consented to it;

therefore, said he, ye are not all clean:
he does not mention his name, though he could have done so, it not being as yet proper to make so full a discovery of him, before the matter was ripe for execution; and also to put all the disciples upon examination of themselves.

California - Do Not Sell My Personal Information  California - CCPA Notice