Then Pharaoh summoned Moses and Aaron and said, “Go, sacrifice to your God within this land.”
25. And Pharaoh called for Moses. Pharaoh imagines that he is granting a great thing, if the Israelites are permitted to offer sacrifice to God in Egypt. He and all his people should have humbly embraced the worship of God, and casting away their superstitions should have sought to Moses as their instructor in sincere piety.
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, it is not meet so to do,.... It being the command and will of God that they should go three days' journey into the wilderness, and sacrifice there; and besides it was dangerous, the Egyptians might be provoked by their sacrifices to fall upon them, and kill them: for we shall sacrifice the abomination of the Egyptians to the Lord our God...