John 13:9KJV

7Jesus answered and said unto him, What I do thou knowest not now; but thou shalt know hereafter.

8Peter saith unto him, Thou shalt never wash my feet. Jesus answered him, If I wash thee not, thou hast no part with me.

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

10Jesus saith to him, He that is washed needeth not save to wash feet, but is clean every whit: and ye are clean, but not all.

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