John 13:31

Ὄτε οὖν ἐξῆλθεν. As soon as Judas had gone out, the spirit of Jesus rose, and with a note of triumph He explains the situation to the disciples. Two points He emphasises: His work is done, and He must leave them. The former He announces in the words Νῦν ἐδοξάσθη … αὐτῷ. “This ‘now' with which the Lord turns to the faithful eleven, expresses at once the feeling of deliverance from the traitor's presence and His free acceptance of the issues of the traitor's work.” Westcott. ἐδοξάσθη the aorist is used because the traitor is considered to have “as it were already completed his deed”. Winer, p. 346. The Son of Man is “glorified” by accomplishing the work of His life by being accepted as the manifestation of God, and by being acknowledged by the Father as having revealed Him; see John 17:1; John 17:4-5; John 12:23; John 11:4. Cf. Milligan's Ascension of our Lord, p. 79.