John 13:12 KJV
So after he had washed their feet, and had taken his garments, and was set down again, he said unto them, Know ye what I have done to you?
John 13:12, King James Version
In context
11 For he knew who should betray him; therefore said he, Ye are not all clean.
12 So after he had washed their feet, and had taken his garments, and was set down again, he said unto them, Know ye what I have done to you?
13 Ye call me Master and Lord: and ye say well; for so I am.