Matthew 26:21

Now as they were eating, He said, "Assuredly, I say to you, one of you will betray Me."

Surrounding context

26:20 When evening had come, He sat down with the twelve.

26:21 Now as they were eating, He said, "Assuredly, I say to you, one of you will betray Me."

26:22 And they were exceedingly sorrowful, and each of them began to say to Him, "Lord, is it I?"