1 Now before the Feast of the Passover, Jesus knowing that His hour had come that He would depart out of this world to the Father, having loved His own who were in the world, He loved them to the end. 2 During supper, the devil having already put into the heart of Judas Iscariot, the son of Simon, to betray Him, 3 Jesus, knowing that the Father had given all things into His hands, and that He had come forth from God and was going back to God, 4 *got up from supper, and *laid aside His garments; and taking a towel, He girded Himself. John 13:1-11 (NASB) Read verses 5-11 on the site.
The following is a note from my John MacArthur Study Bible (2006) pertaining to vv4,5 above:
The dusty and dirty conditions of the region necessitated the need for footwashing. Although the disciples would have likely been willing to wash Jesus’ feet, they would not consider washing each other’s feet. In their society, footwashing was a task assigned to the lowest-ranking household slaves. It was not an action performed by a peer, except possibly as a rare expression of profound love. Luke points out (22:24) that they were arguing about who was the greatest of them, so that none was willing to stoop to wash feet. When Jesus moved to wash their feet, they were shocked. His actions serve also as symbolic of spiritual cleansing (vv. 609) and a model of Christian humility (vv. 12-17). Through this action Jesus taught the lesson of selfless service that was supremely exemplified by His death on the cross.
My brethren, the next time we even begin to think we have become mature believers who have passed all the tests and have totally crucified the flesh, et cetera, we need to reread passages like this one. Do we go and ‘wash the feet’ of our enemies? Do we cling to our animosity against those who have wronged us as if it is “our right” or do we humble ourselves, forgive them and serve them as our Lord would? Notice carefully my brethren that even though our Lord did all of this for Judas Iscariot, it changed nothing. He still betrayed our Lord.