20 I tell you the truth, anyone who welcomes my messenger is welcoming me, and anyone who welcomes me is welcoming the Father who sent me."
21 Now Jesus was deeply troubled, and he exclaimed, "I tell you the truth, one of you will betray me!" 22 The disciples looked at each other, wondering whom he could mean. 23 The disciple Jesus loved was sitting next to Jesus at the table. 24 Simon Peter motioned to him to ask, "Who's he talking about?" 25 So that disciple leaned over to Jesus and asked, "Lord, who is it?" 26 Jesus responded, "It is the one to whom I give the bread I dip in the bowl." And when he had dipped it, he gave it to Judas, son of Simon Iscariot. 27 When Judas had eaten the bread, Satan entered into him. Then Jesus told him, "Hurry and do what you're going to do." 28 None of the others at the table knew what Jesus meant. 29 Since Judas was their treasurer, some thought Jesus was telling him to go and pay for the food or to give some money to the poor. 30 So Judas left at once, going out into the night.
Matthew Henry's Commentary on John 13:20-30
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.