John 13: 3-4 ESV
“Jesus, knowing that the Father had given all things into his hands, and that he had come from God and was going back to God, rose from supper. He laid aside his outer garments, and taking a towel, tied it around his waist.”

Jesus, knowing His time was near at hand to suffer and die for the sins of all mankind, stood up and gave His final teaching; how to be a servant to one another. If it was His final sermon it was a huge statement to us all who we are to be.