GOD'S WORD® Translation
While they were eating, he said, "I can guarantee this truth: One of you is going to betray me."

American Standard Version
and as they were eating, he said, Verily I say unto you, that one of you shall betray me.

Berean Study Bible
And while they were eating, He said to them, “Truly I tell 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.

English Revised Version
and as they were eating, he said, Verily I say unto you, that one of you shall betray me.

King James Bible
And as they did eat, he said, Verily I say unto you, that one of you shall betray me.

World English Bible
As they were eating, he said, "Most certainly I tell you that one of you will betray me."

Young's Literal Translation
and while they are eating, he said, 'Verily I say to you, that one of you shall deliver me up.'

Matthew 26:21 Additional Translations ...