John 13:12-16

After Jesus had washed their feet, he put his outer garment back on and returned to his place at the table. “Do you understand what I have just done to you?” he asked. “You call me Teacher and Lord, and it is right that you do so, because that is what I am. I, your Lord and Teacher, have just washed your feet. You, then, should wash one another's feet. I have set an example for you, so that you will do just what I have done for you. I am telling you the truth: no slaves are greater than their master, and no messengers are greater than the one who sent them.