John 13:4-5

13:4 he got up from the meal, removed his outer clothes, took a towel and tied it around himself. 13:5 He poured water into the washbasin and began to wash the disciples’ feet and to dry them with the towel he had wrapped around himself.

John 13:13-14

13:13 You call me ‘Teacher’ and ‘Lord,’ and do so correctly, for that is what I am. 13:14 If I then, your Lord and Teacher, have washed your feet, you too ought to wash one another’s feet.