John 13:3-5, 14-15

Jesus knew that the Father had given him authority over everything and that he had come from God and would return to God. So he got up from the table, took off his robe, wrapped a towel around his waist, and poured water into a basin. Then he began to wash the disciples’ feet, drying them with the towel he had around him.

And since I, your Lord and Teacher, have washed your feet, you ought to wash each other’s feet. I have given you an example to follow. Do as I have done to you.