John 13:6-10

6He comes therefore to Simon Peter; and he says to him, Lord, dost thou wash my feet?

7Jesus answered and said to him, What I do thou dost not know now, but thou shalt know hereafter.

8Peter says to him, Thou shalt never wash my feet. Jesus answered him, Unless I wash thee, thou hast not part with me.

9Simon Peter says to him, Lord, not my feet only, but also my hands and my head.

10Jesus says to him, He that is washed all over needs not to wash save his feet, but is wholly clean; and ye are clean, but not all.