John 13:12

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?

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? - that is, 'Know ye the intent of it?' The question, however, was not intended to draw forth an answer, but, like many other of our Lord's questions, to summon their attention to His own answer.