John 13:21-24

21After he had said this, Jesus was troubled in spirit and testified, “Very truly I tell you, one of you is going to betray me.” 22His disciples stared at one another, at a loss to know which of them he meant. 23One of them, the disciple whom Jesus loved, was reclining next to him.

24Simon Peter motioned to this disciple and said, “Ask him which one he means.”