C. F. Keil and Franz Delitzsch on Exodus 5:4-5

Exo 5:4-5

But Pharaoh would hear nothing of any worship. He believed that the wish was simply an excuse for procuring holidays for the people, or days of rest from their labours, and ordered the messengers off to their slave duties: “Get you unto your burdens.” For as the people were very numerous, he would necessarily lose by their keeping holiday. He called the Israelites “the people of the land,” not “as being his own property, because he was the lord of the land” (Baumgarten), but as the working class, “land-people,” equivalent to “common people,” in distinction from the ruling castes of the Egyptians (vid., Jer 52:25 : Eze 7:27).