8:10 And he said, To - morrow - Why not immediately? Probably he hoped that this night they would go away of themselves, and then he should get clear of the plague, without being obliged either to God or Moses. However, Moses joins issue with him upon it. Be it according to thy word - It shall be done just when thou wouldst have it done, that thou mayst know, that whatever the magicians pretend to, there is none like unto the Lord our God - None has such a command as he has over all creatures, nor is any so ready to forgive those that humble themselves before him. The great design both of judgments and mercies, is to convince us that there is none like the Lord our God; none so wise, so mighty, so good; no enemy so formidable, no friend so desirable, so valuable.
8:1-15 Pharaoh is plagued with frogs; their vast numbers made them sore 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 these despicable creatures. God, when he pleases, can arm the smallest parts of the creation against us. He thereby humbled Pharaoh. They should 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 will 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 was respite, he hardened his heart. Till the heart is renewed by the grace of God, the thoughts made by affliction do not abide; the convictions 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.
