John 13:10

Verse 10. He that is washed. This is a difficult passage, and interpreters have been divided about its meaning. Some have supposed that it was customary to bathe before eating the paschal supper, and that the apostles did it; Jesus having said, "he that hath bathed his body is clean except in regard to his feet--to the dirt contracted in returning from the bath, and that there was need only that the feet should be washed in order to prepare them properly to receive the supper."