Pharaoh answered, “I will let you go and sacrifice to the LORD your God in the wilderness, but you must not go very far. Now pray for me.”
28. And Pharaoh said, I will let you go. When he sees that his delays and shifts avail him nothing, he professes entire obedience; not that he then proposed to deceive and lie, because he was prevented by fear; but only, because overwhelmed with a present sense of his calamity, he dared not raise his crest against God.
Here is the story of the plague of flies, in which we are told, I. How it was threatened, like that of frogs, before it was inflicted. Moses is directed (Exo 8:20) to rise early in the morning, to meet Pharaoh when he came forth to the water, and there to repeat his demands. Note, 1.
Commenting on Exodus 8:20-32
And Moses said, behold, I go out from thee,.... Directly, immediately, to the place where he was wont to meet the Lord, and receive orders and instructions from him: and I will entreat the Lord that the swarms of flies may depart from Pharaoh; for as he sent them, he only could remove them, and he could do the one as easily as he did...