Exodus 8:20-27

20Then the Lord said to Moses, “Early in the morning, stand in Pharaoh’s way when he’s going to the Nile. Say to him, ‘This is what the Lord says: Let my people go to worship me.

21If you will not let my people go, I will send swarms of flies on you, your officials, your people, and your houses. The homes of the Egyptians will be filled with flies, and even the ground outside will be covered with them.

22But on that day I will treat the region of Goshen differently. That is where my people live. There won’t be any flies there. This way you will know that I, the Lord, am here in this land.

23I will distinguish between my people and yours. This miraculous sign will happen tomorrow.’ ”

24The Lord did what he said. Dense swarms of flies came into Pharaoh’s palace and into the houses of his officials. All over Egypt the flies were ruining everything.

25Pharaoh called for Moses and Aaron and said, “Go, sacrifice to your God here in this country.”

26Moses replied, “It wouldn’t be right to do that. The sacrifices we offer to the Lord our God are disgusting to Egyptians. If they see us offer sacrifices that they consider disgusting, won’t they stone us to death?

27We need to travel three days into the desert to offer sacrifices to the Lord our God, as he told us to do.”