Matthew Poole and continuators on 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 ?

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 Iews had besides the Passover Supper, and probably before it, tho 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▪