John 13:10-12

ASV(i) 10 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. 11 For he knew him that should betray him; therefore said he, Ye are not all clean.
12 So when he had washed their feet, and taken his garments, and sat down again, he said unto them, { Know ye what I have done to you?