New Revised Standard Version
and while they were eating, he said, “Truly I tell you, one of you will betray me.”

New American Bible
And while they were eating, he said, “Amen, I say to you, one of you will betray me.”

Douay-Rheims Bible
And whilst they were eating, he said: Amen I say to you that one of you is about to betray me.

And whilst they were eating, he said: Amen I say to you that one of you is about to betray me.

Verily.

Matthew 26:2,14-16 You know that after two days shall be the pasch: and the Son of man shall be delivered up to be crucified. . . .

Psalm 55:12-14 For if my enemy had reviled me, I would verily have borne with it. And if he that hated me had spoken great things against me, I would perhaps have hidden my self from him. . . .

John 6:70,71 Jesus answered them: Have not I chosen you twelve? And one of you is a devil. . . .

John 13:21 When Jesus had said these things, he was troubled in spirit; and he testified, and said: Amen, amen, I say to you, one of you shall betray me.

Hebrews 4:13 Neither is there any creature invisible in his sight: but all things are naked and open to his eyes, to whom our speech is.

Revelation 2:23 And I will kill her children with death: and all the churches shall know that I am he that searcheth the reins and hearts. And I will give to every one of you according to your works. But to you I say