Eat that today - The practical observance of the Sabbath was thus formally instituted before the giving of the law. The people were to abstain from the ordinary work of every day life: they were not to collect food, nor, as it would seem, even to prepare it as on other days.
Related Commentaries of Exodus 16:25
Exodus 16:25
25 And Moses said, Eat that to day; for to day is a sabbath unto the LORD: to day ye shall not find it in the field.