Matthew Poole and continuators on John 13:4

4 He riseth from supper, and layeth aside his garments, and took a towel, and girded himself .

He riseth from Supper, what Supper is the question; We are told, that the Iews had two Suppers upon the Paschal night, which was the 14th. day of the month Nisan. The first, was the Passover Supper, which was a Religious rite in obedience to the Law. The second, a common Supper, (as on other nights) to which our Saviour added a third, which was the Lords Supper. To me it seemeth rather that their common Supper was first, then the Passover Supper; and that Christ arose from this common Supper, to do this act. Augustine understood it of the common Supper; so doth Beza, Heinsius, Tarnovius, and others which seemeth to me most probable; tho others understand it of the Passover Supper. Whatever Supper the Evangelist meaneth, Christ rose up from it before it was done. Calvin, Pareus, Beza, Petargus, Tossanus, and divers others amongst the Protestant Interpreters; Tolet, Maldonate, and Iansenius, amongst the Papists, do agree a common Supper this night, beside the Paschal Supper, and the Lords Supper; from which it is most probable that Christ, as is here said, rose up, and laid aside his garment, that is, his outward loose garment, (for such they used) which servants were wont to gird up when they waited at Table, Luke 17.8. Christ laid one aside, and girded up the other, takes a towel.