John 13:19

I say to you at once, before it come to pass, that when it come to pass ye may believe that I am. Now, in the Greek, απ άζτι, which may be translated from now or from this time, as in the Syriac Version, or, as here, straightway, forthwith, indicating the treachery of Judas to be near at hand. A few hours hence Judas shall betray Me, and therefore I foretell it to you, that when you see Me betrayed, seized, and killed, you may not be disturbed, but may believe persevere in My Faith, that I am the Messiah, the Son of God, freely offering Myself to death for the redemption of mankind. I foretell all these things to you that you may believe that I know them all beforehand and could withdraw Myself from danger, but that I will not, but wish to suffer for the salvation of the world. Then, too, shall you see that I said truly, "Ye are not all clean" that Judas is unclean and wicked, and therefore to be reprobated and condemned, when you see him for the enormity of his crime strangle himself with a cord. Let, therefore, this prediction of Mine, coupled with the occurrence of the thing predicted, make you firm and strong in My faith when you are on the point of tottering. So Cyril.