Exodus 10:1-5

1Then the Lord said to Moses, "Go in to Pharaoh, for I have hardened his heart and the heart of his servants, that I may show these signs of mine among them,

2and that you may tell in the hearing of your son and of your grandson how I have dealt harshly with the Egyptians and what signs I have done among them, that you may know that I am the Lord."

3So Moses and Aaron went in to Pharaoh and said to him, "Thus says the Lord, the God of the Hebrews, 'How long will you refuse to humble yourself before me? Let my people go, that they may serve me.

4For if you refuse to let my people go, behold, tomorrow I will bring locusts into your country,

5and they shall cover the face of the land, so that no one can see the land. And they shall eat what is left to you after the hail, and they shall eat every tree of yours that grows in the field,