John 13:30

He then, having received the sop, went immediately out--severing himself for ever from that holy society with which he never had any spiritual sympathy. and it was night--but far blacker night in the soul of Judas than in the sky over his head.

Our Saviour having finished his public discourses, in which he "endured the contradiction of sinners," now applies himself to a private conversation with his friends, in which he designed the consolation of saints. Henceforward we have an account of what passed between him and his disciples, who were to be entrusted with the affairs of his household, when he was gone into a far country; the necessary instructions and comforts he furnished them with. His hour being at hand, he applies himself to set his house in order. In this chapter I. He washes his disciples' feet (v. 1-17). II. He foretels who should betray him (Joh 13:18-30). III. He instructs them in the great doctrine of his own death, and the great duty of brotherly love (Joh 13:31-35). IV. He foretels Peter's denying him (Joh 13:36-38).

13:30 out into the night: Judas’s departure was emblematic: The darkness had swallowed him completely (see study note on 13:2; cp. 3:19). Jesus, the light of the world, is the antithesis of the night.