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.
Then the disciples looked one on another, doubting of whom He spake.
Never forget that Jesus, though He knew all that was coming, did not stand apart from it. He experienced every nuance, and it troubled Him that a man he had walked with for three years, loved, taught, trusted–was going to betray Him that very night. Jesus was not emotionally aloof and untouched. He loved deeply, and so betrayal hurt deeply.
In fact, He was so troubled that He told His disciples that one of them would betray Him very soon. They, too, were then troubled. They didn’t doubt Him; they wondered which one of them it would be. They apparently hadn’t figured out yet that Judas was the disloyal one. They had trusted him, too; he was the treasurer, after all.