John the Apostle
John 13:18ESV·traditional attribution

I am not speaking of all of you; I know whom I have chosen. But the Scripture will be fulfilled, ‘He who ate my bread has lifted his heel against me.’

John Calvin Reformed @genevareformer

18. I speak not of you all. He again declares that there is one among the disciples who, in reality, is the very reverse of a disciple; and he does so, partly for the sake of Judas, in order to render him the more inexcusable, and partly for the sake of the others, ‘That they may not be overpowered by the ruin of Judas.

Matthew Henry Presbyterian @wholebiblehenry

We have here the discovery of Judas's plot to betray his Master. Christ knew it from the beginning; but now first he discovered it to his disciples, who did not expect Christ should be betrayed, though he had often told them so, much less did they suspect that one of them should do it. Now here, I.

Commenting on John 13:18-30

John Gill Reformed Baptist @doctorgill

I speak not of you all. What he had before said on the one hand, "ye are not all clean", Joh 13:11, for one of them was not; and on the other hand, when he put an "if" upon, or seemed to doubt of their knowing and doing these things, Joh 13:17; or what he was about to say concerning his being betrayed, this he...