John 13:6-10
New King James Version (NKJV)

6 Then He came to Simon Peter.
And Peter said to Him, “Lord, are You washing my feet?”

7 Jesus answered and said to him, “What I am doing you do not understand now, but you will know after
this.”

8 Peter said to Him, “You shall never wash my
feet!”

Jesus answered him, “If I do not wash you, you
have no part with Me.”

9 Simon Peter said to Him, “Lord, not my feet only,
but also my hands and my head!”

10 Jesus said to him, “He who
is bathed needs only to wash his feet, but is completely clean; and you are
clean, but not all of you.”