John 13:30

Went immediately out] St. John represents Judas as departing before the institution of the Holy Communion (see John 13:34). The synoptists (or, at least, St. Luke) seem to represent him as remaining and communicating. St. John's account is altogether more probable.

Night] The word has tragic emphasis. It was night literally, a time appropriate for deeds of darkness; also it was night spiritually in the soul of Judas, in which the light of God's Spirit had been for ever quenched.

John 13:31 to John 17:26. The Last Discourses of Jesus to His disciples. We come now to what is perhaps the most precious part of the whole evangelical history, those wonderful discourses, delivered by our Lord in the upper room just after the institution of the Lord's Supper. St. John alone records them. Like a consecrated priest, the evangelist conducts us into the Holy of Holies, revealing the inmost thoughts, desires, and aspirations of our divine Redeemer.

31-35. The Lord's Supper (Holy Communion) and the New Commandment of Love. Relieved of the traitor's presence, our Lord institutes the rite of Holy Communion, which is to take the place of the Passover, and proceeds to explain its significance as a pledge and bond of love among the disciples (John 13:34), and afterwards as a means of union and communion with Himself (John 15:1.).