Instead of contention, you should follow My example and learn from Me.
John the evangelist notes that the foot washing occurred during the meal and that Jesus arose from the table specifically for this act (John 13:2, 4). What transpired at the outset, before Jesus stood to wash His feet? To find the answer, we turn to the Gospel of Luke, which reveals that a dispute arose among the apostles regarding who should be considered the greatest. This contention likely did not stem from their seating arrangements, as they had previously dined with Jesus and had chosen their places according to their customary practices. It also could not have been about seniority in the Kingdom of the Messiah, as Jesus had already addressed this matter. More plausibly, this disagreement emerged over who among them would take on the role of a servant—specifically, who would wash the dusty feet of the guests that evening. Luke corroborates this by recording Jesus asking, ‘Who is greater, the one who reclines at the table or the one who serves? But I am among you as one who serves.’ These words were spoken after Jesus had washed the feet of the apostles, indicating that the washing occurred following their dispute. Regardless of the underlying cause of their arguments, it is clear that the apostles were debating at the very beginning of the evening. Such disputes could not have arisen after Jesus' demonstration of humility in washing their feet, nor could they emerge after the establishment of the Eucharist since this sacrament unifies all the apostles.
If the apostles were engaged in argument at the onset of the meal, and this was followed by the foot washing, and subsequently by Jesus' teachings on humility, coupled with the identification of Judas as the traitor and his consequent departure, it becomes evident that the sacrament was not instituted at the very beginning of the Supper, prior to the foot washing. It follows that Christ could only present His Body and Blood under the guise of bread and wine to those who believed in Him—those destined to foster God's kingdom of love and goodness on earth and to unite all its members through this sacrament of communion with the Founder and eternal Head of that kingdom. Judas, having plotted to betray his Master, was not part of this kingdom, thus rendering his presence at the sacrament's institution inappropriate. The sequence of events at the Last Supper unfolds as follows: the apostles’ argument, the washing of their feet, Jesus’ instruction regarding their dispute and His exemplary humility, the declaration of Judas as the traitor leading to his departure, the establishment of the sacrament, and the subsequent farewell discourse. From this order, it is clear: Judas was not present during the institution of the sacrament.