Matthew Poole and continuators on John 13:27

27 And after the sop Satan entred into him . Then Jesus said unto him, That thou doest, do quickly .

That the Devil did ever so enter into Iudas as to possess him, as we read of many who were possessed, and violently acted by the Devil, is more than we read any wherein holy Writ; the entrance into him, signifies Iudas his free and willing giving up of himself to the Devils s[illegible: 1 letter]ggestions and conduct: and in this sense the Dev[illegible: 2 letters] also before this time was entred into Iudas, Luke 22.3. But as holy men are said to be filled with the Spirit of God, who had before received the Spirit, because the holy Spirit came after upon them with fuller and stronger impulses, and notions: so tho the Devil had formerly been moving Iudas to this vile Act, and had had his consent to it; yet after he had taken this mouthfull, the Devil plyed him with stronger notions, impu[illegible: 1 letter]ses, and suggestions: and now he had master'd his conscience, and hardned his heart, so as he was more prepared for the Villany about which he had some thoughts before: he had now with an unbelieving, and unthankful heart, been eating the Passover, which was a Type of Christ; and had so mastered his conscience, as to come and do this, with a vile heart, reaking before with treacherous and bloody designs against his Lord and Master: See what is the effect. His heart is more vile, more treacherous, and bloody, he is twice more the servant of the Devil than he was before. The sop given him by Christ, was but an accidental occasion of it; as the Devil took more advantage from his now hardned, and further imboldned heart, and he is twice more the child of the Devil than he was before.

Christ knowing this, doth not command, advise, or exhort him, but in a detestation, bids him go and do what he was resolved to do, and which he knew would be quickly; letting him both know, that he knew what was in his heart, and that he was now ready to receive the effects of his malice.