21 These things having said, Jesus was troubled in the spirit, and did testify, and said, 'Verily, verily, I say to you, that one of you will deliver me up;' 22 the disciples were looking, therefore, one at another, doubting concerning whom he speaketh. 23 And there was one of his disciples reclining (at meat) in the bosom of Jesus, whom Jesus was loving; 24 Simon Peter, then, doth beckon to this one, to inquire who he may be concerning whom he speaketh, 25 and that one having leant back on the breast of Jesus, respondeth to him, 'Sir, who is it?' 26 Jesus answereth, 'That one it is to whom I, having dipped the morsel, shall give it;' and having dipped the morsel, he giveth 'it' to Judas of Simon, Iscariot. 27 And after the morsel, then the Adversary entered into that one, Jesus, therefore, saith to him, 'What thou dost—do quickly;' 28 and none of those reclining at meat knew for what intent he said this to him, 29 for certain were thinking, since Judas had the bag, that Jesus saith to him, 'Buy what we have need of for the feast;' or that he may give something to the poor; 30 having received, therefore, the morsel, that one immediately went forth, and it was night.
Matthew Henry's Commentary on John 13:21-30
Commentary on John 13:18-30
(Read John 13:18-30)
Our Lord had often spoken of his own sufferings and death, without such trouble of spirit as he now discovered when he spake of Judas. The sins of Christians are the grief of Christ. We are not to confine our attention to Judas. The prophecy of his treachery may apply to all who partake of God's mercies, and meet them with ingratitude. See the infidel, who only looks at the Scriptures with a desire to do away their authority and destroy their influence; the hypocrite, who professes to believe the Scriptures, but will not govern himself by them; and the apostate, who turns aside from Christ for a thing of naught. Thus mankind, supported by God's providence, after eating bread with Him, lift up the heel against Him! Judas went out as one weary of Jesus and his apostles. Those whose deeds are evil, love darkness rather than light.