John 13:5-11

Then he poureth water into the basin, and began to wash the disciples’ feet, and to wipe them with the towel wherewith he was girded. So he cometh to Simon Peter. He saith unto him, Lord, dost thou wash my feet? Jesus answered and said unto him, What I do thou knowest not now; but thou shalt understand hereafter. Peter saith unto him, Thou shalt never wash my feet. Jesus answered him, If I wash thee not, thou hast no part with me. Simon Peter saith unto him, Lord, not my feet only, but also my hands and my head. Jesus saith to him, He that is bathed needeth not save to wash his feet, but is clean every whit: and ye are clean, but not all. For he knew him that should betray him; therefore said he, Ye are not all clean.