“When Jesus had thus said, he was troubled in spirit, and testified, and said, Verily, verily, I say unto you, that one of you shall betray me.”
King James Version (KJV)
13:21 One of you - The speaking thus indefinitely at first was profitable to them all.
Joh 13:21 Troubled in spirit. Because a traitor was present among the apostles. For the exposure of Judas, see notes on Mt 26:21-25. Compare Mr 14:18-21.