John 13:11-15

For Jesus knew who would betray him. That is what he meant when he said, “Not all of you are clean.” After washing their feet, he put on his robe again and sat down and asked, “Do you understand what I was doing? You call me ‘Teacher’ and ‘Lord,’ and you are right, because that’s what I am. 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.