Then the LORD said to Moses, “How long will you refuse to keep My commandments and instructions?
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
See, for that the Lord hath given you the sabbath,.... These are either the words of Jehovah, the Angel of the Lord, out of the cloud continued; or the words of Moses to the children of Israel, upon what the Lord had said to him, and would have them observe and take notice, that whereas the Lord had given them a sabbath, or enjoined them...
Exo 16:27-30 On the seventh day some of the people went out to gather manna, notwithstanding Moses’ command, but they found nothing. Whereupon God reproved their resistance to His commands, and ordered them to remain quietly at home on the seventh day.
Commenting on Exodus 16:27-30