Exodus 8:22-24 Christian Standard Bible (CSB)
22 But on that day I will give special treatment to the land of Goshen, where my people are living; no flies will be there. This way you will know that I, the Lord, am in the land. 23 I will make a distinction[a] between my people and your people. This sign will take place tomorrow.”
24 And the Lord did this. Thick swarms of flies went into Pharaoh’s palace and his officials’ houses. Throughout Egypt the land was ruined because of the swarms of flies.