After that our Saviour had finished this ceremony, and washed his disciples feet, (some question whether all or no, but I see no reason to doubt it), he returned again to the supper, which probably now was near finished, which certainly was the common supper which the Jews had besides the passover supper, and probably before it, though some think after it. He asketh them if they knew the meaning of this which he had done unto them; lest they should not fully understand it, he openeth it to them in the following discourse.
Related Commentaries of John 13:12
John 13:12
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?