What is the meaning of John 13:18?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

I am not speaking about all of you; I know whom I have chosen. But this is to fulfill the Scripture: ‘The one who shares My bread has lifted up his heel against Me.’

Berean Standard Bible (BSB)

I don’t speak concerning all of you. I know whom I have chosen. But that the Scripture may be fulfilled, ‘He who eats bread with me has lifted up his heel against me.’

World English Bible (WEB)

I speak{G3004}{(G5719)} not{G3756} of{G4012} you{G5216} all{G3956}: I{G1473} know{G1492}{(G5758)} whom{G3739} I have chosen{G1586}{(G5668)}: but{G235} that{G2443} the scripture{G1124} may be fulfilled{G4137}{(G5686)}, He that eateth{G5176}{(G5723)} bread{G740} with{G3326} me{G1700} hath lifted up{G1869}{(G5656)} his{G846} heel{G4418} against{G1909} me{G1691}.

Strong's King James

(18) I don't speak of all of you. I know who I choose, yet so this is that the Scripture may be completed,'The one eating My bread has raised up his heel against Me'

The F.O.G*

[18] I'm not talking about all of you—I know exactly whom I've chosen. But the ancient Scripture must be fulfilled that says, 'The one who shares My bread has turned against Me.'

The F.O.G Paraphrase

not concerning you all do I speak; I have known whom I chose for myself; but that the Writing may be fulfilled: He who is eating the bread with me, did lift up against me his heel.

Young's Literal Translation