John 13:12-17 KJV

12 So after he had washed their feet, and had taken his garments, and was set down again, he said unto them, Know ye what I have done to you?

13 Ye call me Master and Lord: and ye say well; for so I am.

14 If I then, your Lord and Master, have washed your feet; ye also ought to wash one another's feet.

15 For I have given you an example, that ye should do as I have done to you.

16 Verily, verily, I say unto you, The servant is not greater than his lord; neither he that is sent greater than he that sent him.

17 If ye know these things, happy are ye if ye do them.