he said to them, “This is what the LORD has commanded: ‘Tomorrow is a day of solemn rest, a holy Sabbath to the LORD; bake what you will bake and boil what you will boil, and all that is left over lay aside to be kept till the morning.’”
We have here, 1. A plain intimation of the observing of a seventh day sabbath, not only before the giving of the law upon Mount Sinai, but before the bringing of Israel out of Egypt, and therefore, from the beginning, Gen 2:3.
Commenting on Exodus 16:22-31
And they laid it up until the morning, as Moses bade,.... What was left of two omers a man, what they had neither baked nor boiled: and it did not stink, neither was there any worm therein, which was the case, when it was left or laid up on other days; and it showed that there was an interposition of divine Providence in the keeping...
To-morrow is the rest of the holy Sabbath - There is nothing either in the text or context that seems to intimate that the Sabbath was now first given to the Israelites, as some have supposed: on the contrary, it is here spoken of as being perfectly well known, from its having been generally observed.