John 13:12-15

12 “After washing their feet, he put on his robe again and sat down and asked,  “Do you understand what I was doing?  13 You call me ‘Teacher’ and ‘Lord,’ and you are right, because that’s what I am.  14 And since I, your Lord and Teacher, have washed your feet, you ought to wash each other’s feet.  15 I have given you an example to follow. Do as I have done to you.”