After supper. [1] We shall afterwards take into consideration, at the proper place, the whole of Christ's design in washing the feet of his disciples, and the advantage to be derived from this narrative. Let us now attend to the connection of the words. The Evangelist says that this was done, while Judas already resolved to betray Christ, not only to show the wonderful patience of Christ, who could endure to wash the feet of such a wicked and detestable traitor; but also that he purposely selected the time when he was near death, for performing what may be regarded as the last act of his life. The devil having already put it into the heart of Judas. When the Evangelist says that Judas had been impelled by the devil to form the design of betraying Christ, this tends to show the enormity of the crime; for it was dreadful and most atrocious wickedness, in which the efficacy of Satan was openly displayed. There is no wickedness, indeed, that is perpetrated by men, to which Satan does not excite them, but the more hideous and execrable any crime is, the more ought we to view in it the rage of the devil, who drives about, in all possible directions, [2] men who have been forsaken by God. But though the lust of men is kindled into a fiercer flame by Satan's fan, still it does not cease to be a furnace; it contains the flame kindled within itself, it receives with avidity the agitation of the fan, so that no excuse is left for wicked men.

Footnotes

1 - "Et apres avoir souppe." -- "And after having supped."

2 - "Sursum ac deorsum." -- "Up and down."

Supper being ended - This translation expresses too much. The original means while they were at supper; and that this is the meaning is clear from the fact that we find them still eating after this. The Arabic and Persic translations give it this meaning. The Latin Vulgate renders it like the English.
The devil - The leader or prince of evil spirits.
Having now put it into the heart - Literally, having cast it into the heart. Compare Ephesians 6:16; "The fiery darts of the wicked." See Acts 5:3; Luke 22:3. The meaning of this passage is that Satan inclined the mind of Judas to do this, or he tempted him to betray his Master. We know not precisely how this was done, but we know that it was by means of his avarice. Satan could tempt no one unless there was some inclination of the mind, some natural or depraved propensity that he could make use of. He presents objects in alluring forms fitted to that propensity, and under the influence of a strong or a corrupt inclination the soul yields to sin. In the case of Judas it was the love of money; and it was necessary to present to him only the possibility of obtaining money, and it found him ready for any crime.

And supper being ended - Rather, δειπνου γενομενου, while supper was preparing. To support this new translation of the words, it may be remarked that, from John 13:26, John 13:30, it appears that the supper was not then ended: nay, it is probable that it was not then begun; because the washing of feet (John 13:5) was usually practised by the Jews before they entered upon their meals, as may be gathered from Luke 7:44, and from the reason of the custom. I think that John wrote, not γενομενου, but γινομενου, as in BL. Cant. and Origen, which latter reading is approved by several eminent critics, and should be translated as above. By the supper I suppose to be meant, not only the eating of it, but the preparing and dressing of it, and doing all things necessary previously to the eating of it. The devil had, before this time of the supper, put it into Judas's heart to betray his Master. See Matthew 26:14, etc.; Mark 14:10, Mark 14:11; and Luke 22:3, etc. See also Bishop Pearce, from whose judicious commentary the preceding notes are principally taken.
Calmet observes that John, designing only to supply what was omitted by the other evangelists, passes over all the transactions of the Tuesday, Wednesday, and Thursday, before the passion, and at once goes from Monday evening to Thursday evening. It is remarkable that St. John says nothing about the institution of the holy sacrament, which Matthew, Matthew 26:26, etc., Mark, Mark 14:22, etc., and Luke, Luke 22:19, etc., describe so particularly. No other reason can be assigned for this than that he found it completely done by the others, and that he only designed to supply their defects.
The devil having now put it into the heart - Judas formed his plot six days before this, on occasion of what happened at the house of Simon the leper: see Matthew 26:14. Calmet.

And supper being ended,.... Or rather "supper being", or it "being supper time", for it was not ended; not the paschal supper, nor the Lord's supper, but the supper in Simon's house at Bethany, two days before the passover. There is no mention made in this whole chapter of the passover supper, or of any of its rites: the washing of the disciples' feet was a peculiar action of our Lord's, and had no manner of regard to any usage among the Jews at such a time; nor was it ever usual with them, at the passover, to wash the feet of those that ate of it; there is not the least trace of any such custom in any of their writings: besides, it is said in so many words, in John 13:1, that this was "before the feast of the passover"; and by comparing it with Matthew 26:2, it appears to be two days before it; and so much time seems necessary to be allowed, for Judas to do what he did after this supper, in which he was first instigated to it: and that the feast of the passover was yet to come, when this supper was ended, and Judas had taken the sop, and was bid to do quickly what he did, is manifest from the sense the disciples put upon those words of Christ, who thought he ordered him to get the necessaries for the feast, John 13:29, which can be understood of no other than the feast of the passover, which was at hand, and for which many things were to be got ready; to which may be added, that Satan's entering into Judas, and putting it into his heart to betray his master, and his covenanting with the high priests to do it for such a sum, were before the passover supper, as is clear from Luke 22:1. Nor is it reasonable to suppose that Judas could meet that night, after the supper, with the chief priests, captains, and all the council, the great sanhedrim, who could not be together; since by the law of the passover, every head of a family was to be with his respective family: and if this could be supposed, yet there seems to be some time between this agreement, and the execution of it, in which he sought for a proper opportunity, Matthew 26:16. Nor can it be thought there was time enough to do all he did, as to covenant with the chief priests, form his scheme for apprehending Christ, and get such a number of men together for that purpose, between the supper, and the time of night in which Christ was betrayed. Besides, certain it is, that Christ and his disciples arose from the place where he ate his supper, and went from thence elsewhere, John 14:31, which cannot be understood very well of any other departure than his going from Bethany to Jerusalem, and not of his going from Jerusalem to the garden, which is afterwards spoken of as a distinct thing, John 18:1. And to say no more, there is not in this chapter the least hint of the institution of the Lord's supper, which all the other evangelists make mention of, when they relate the last passover of our Lord. The reader may be more fully satisfied of the truth of this by consulting Dr. Lightfoot on Matthew 26:6.
The devil having now put it into the heart of Judas Iscariot, Simon's son, to betray him; the person Satan influenced and acted upon, for his purpose, was Judas iscariot, Simon's son: whether this was Simon the Pharisee, or Simon the leper, in whose house Christ and his disciples were, or who he was, is not certain: was there any reason to think it might be Simon the tanner that was the father of Judas, or that either he or his father were tanners, I would venture to add one conjecture more to what has been made on Matthew 10:4, concerning Judas's surname, Iscariot, as that it may come from "Iscortia", which signifies a tanner's coat: for so it is said in the (q) Talmud,
"what is "Iscortia?" says Rabba bar Chanah, it is , "a tanner's coat":''
a sort of a leathern garment, as the gloss says, which tanners put over their clothes. However, this man was an apostle of Christ's whom Satan tempted to betray him; so that we see that the highest office, and greatest gifts, cannot secure men from the temptations of Satan: the manner in which he tempted him was, he "put", or "cast it into his heart"; it was a dart, and a fiery one, he threw into him, into his very heart; which shows the access Satan has into, and the influence he has upon the minds of men: his end in this temptation was to work upon him "to betray" Christ, his Lord and master, who had chosen him to be an apostle of his, and had invested him with this high office, into the hands of his enemies, in order to be put to death. This was an affair determined by God, known by Christ, and which he foretold to his disciples; yet all this did not in the least excuse the malice of Satan, and the wickedness of Judas: it was an action devilish indeed, and which, one would think, could never have entered into his heart, had not the devil put it there; and this was at supper time, whilst they were at table together, that this thought was darted into his mind; which is mentioned to show, that no place and company can preserve persons from the evil suggestions of the devil, and to aggravate the sin of Judas, who when, and while he was eating bread with Christ, first thought of, and determined to lift up his heel against him: moreover, it was when the ointment was poured on the head of Christ, and whilst Judas was fretting at it, that Satan took the opportunity of his choler and wrath, to stir him up to so vile an action. This account is prefaced to Christ's washing the feet of his disciples, to show the great composure of mind Christ was in, though he knew what was doing; and his wonderful condescension in washing the feet of so vile a creature, into whose heart Satan had already put it to betray him; and also his care of, and love to the rest of the disciples, when Satan had got possession of one of them.
(q) T. Bab. Nedarim, fol. 55. 2. Vid. Maimon. & Bartenora in Misn. Celim. c. 16. sect. 4. & Oholot, c. 8. sect. 1.

supper being ended--rather, "being prepared," "being served," or, "going on"; for that it was not "ended" is plain from John 13:26.
the devil having now--or, "already."
put into the heart of Judas . . . to betray him--referring to the agreement he had already made with the chief priests (Luke 22:3-6).

Supper being ended. The Revision says, "During the Supper." It is likely that Christ arose near the beginning of the feast, washed the feet, and then sat down again to the feast. See John 13:12.
The devil having already put into the heart of Judas Iscariot, etc. The devil planted the seed, but the soil of his heart was ready. The devil has no power except where there is preparation for him. The covetous disposition of Judas had prepared the way.

Having now - Probably now first.