Exodus 10:5-6

5They will cover the land so that you won’t be able to see the ground. They will devour what little is left of your crops after the hailstorm, including all the trees growing in the fields.

6They will overrun your palaces and the homes of your officials and all the houses in Egypt. Never in the history of Egypt have your ancestors seen a plague like this one!” And with that, Moses turned and left Pharaoh.