And supper being ended, the devil having now put into the heart of Judas Iscariot, Simon's son, to betray him; 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.