"When [Jesus] had washed their feet and put his garments back on and reclined at table again, he said to them, 'Do you realize what I have done for you? You call me "teacher" and "master," and rightly so, for indeed I am. If I, therefore, the master and teacher, have washed your feet, you ought to wash one another’s feet. I have given you a model to follow, so that as I have done for you, you should also do.' "
~John 13:12-15