John 13:13 ASV

¹¹  For he knew him that should betray him; therefore said he, Ye are not all clean.

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

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

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

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