Mark 14:18-20 NIV

18 While they were reclining at the table eating, he said, "I tell you the truth, one of you will betray me--one who is eating with me."
19 They were saddened, and one by one they said to him, "Surely not I?"
20 "It is one of the Twelve," he replied, "one who dips bread into the bowl with me.1

References for Mark 14:20