And was set down again. — This means in the reclining position customary at meals. Comp. Luke 11:37; Luke 22:14; and in this Gospel John 6:10; John 21:20. Here it implies that the washing the feet preceded the supper (John 13:1).
Know ye what I have done to you? — This question is asked, not to be answered, but to direct their attention to what He had done, and to the interpretation which follows — “Do ye perceive what I have done? This is the meaning of it.”