Origen

(t. xxxii. 16.) Our Lord then said to Judas, That thou doest, do quickly, and the traitor this once obeyed his Master. For having received the sop, he started immediately on his work: He then having received the sop, went, immediately out. And indeed he did go out, not only from the house in which he was, but from Jesus altogether. It would seem that Satan, after he had entered into Judas, could not bear to be in the same place with Jesus: for there is no agreement between Jesus and Satan. Nor is it idle enquiring why after he had received the sop, it is not added, that he ate it. Why did not Judas cat the bread, after he received it? Perhaps because, as soon as he had received it, the devil, who had put it into his heart to betray Christ, fearful that the bread, if eaten, might drive out what he had put in, entered into him, so that he went out immediately, before he ate it. And it may be serviceable to remark, that as he who eateth our Lord’s bread and drinketh His cup unworthily, eateth and drinketh to his own damnation; so the bread which Jesus gave him was eaten by the rest to their salvation, but by Judas to his damnation, inasmuch as after it the devil entered into him.