Matthew Poole and continuators on Exodus 16:23

23 And he said unto them, This is that which the LORD hath said , to morrow is the rest of the holy Sabbath unto the LORD: bake that which you will bake, to day , and seethe k that ye will seethe, and that which remaineth over, lay up for you to be kept until the morning .

Either to Moses by inspiration: or to the former Patriarks upon like occasions; this practise is agreeable to the former word and law of God, concerning the Sabbath, as it follows.

The Manna was dressed these two ways, Numb. 11. 8.

These words, to day, are not in the original, and possibly are better left out than taken in, or, if they be taken in, they do not seem to me, as they do to many others, to prove, that they were commanded to bake or seethe on the sixth day all that they were to eat both that day and upon the following Sabbath, or that they were forbidden to bake or seethe it upon the Sabbath day; for there is not a word here to that purpose, and it is apparent from the whole context, that the rest of the Sabbath is not opposed to their baking or seething of it, but to their going out into the field to gather it. Nay the contrary is here implyed, because after they had baken and sodden what they intended to bake or seethe, part of the Manna did, as is here expresly added, remain over and was reserved for the Sabbath days provision, and that unbaken and unsodden, otherwise it would not have been noted as a miraculous thing, that it did not stink nor breed worms, ver. 24.

What you do not eat this day keep for the next days provision.