John 13:3-7

3Jesus knew that the Father had put all things under his power, and that he had come from God and was returning to God; 4so he got up from the meal, took off his outer clothing, and wrapped a towel around his waist.

5After that, he poured water into a basin and began to wash his disciples’ feet, drying them with the towel that was wrapped around him.

6He came to Simon Peter, who said to him, “Lord, are you going to wash my feet?”

7Jesus replied, “You do not realize now what I am doing, but later you will understand.”