Adam Clarke's Bible Commentary Verse 1. Let my people go] God, in great mercy to Pharaoh and the Egyptians, gives them notice of the evils he intended to bring upon them if they continued in their obstinacy. Having had therefore such warning, the evil might have been prevented by a timely humiliation and return to God.
Matthew Henry Commentary
Verses 1-15 - Pharaoh is plagued with frogs; their vast numbers made them sor plagues to the Egyptians. God could have plagued Egypt with lions, or bears, or wolves, or with birds of prey, but he chose to do it by thes despicable creatures. God, when he pleases, can arm the smallest part of the creation against us. He thereby humbled Pharaoh. They shoul neither eat, nor drink, nor sleep in quiet; but wherever they were they should be troubled by the frogs. God's curse upon a man wil pursue him wherever he goes, and lie heavy upon him whatever he does Pharaoh gave way under this plague. He promises that he will let the people go. Those who bid defiance to God and prayer, first or last will be made to see their need of both. But when Pharaoh saw there wa respite, he hardened his heart. Till the heart is renewed by the grac of God, the thoughts made by affliction do not abide; the conviction wear off, and the promises that were given are forgotten. Till the state of the air is changed, what thaws in the sun will freeze again in the shade.
Original Hebrew ויאמר559 יהוה3068 אל413 משׁה4872 בא935 אל413 פרעה6547 ואמרת559 אליו413 כה3541 אמר559 יהוה3068 שׁלח7971 את853 עמי5971 ויעבדני׃5647