Exodus 9:23-25, 29

When Moses raised his walking stick toward the sky, the LORD sent thunder and hail, and lightning flashed down to the earth. So he caused hail to fall upon the land of Egypt. There was hail, and lightning flashed as it hailed—the worst hailstorm in Egypt since it had become a nation. The hail destroyed all the people and animals that were in the fields in all the land of Egypt. It also destroyed everything that grew in the fields and broke all the trees in the fields.

Moses told the king, “When I leave the city, I will raise my hands to the LORD in prayer, and the thunder and hail will stop. Then you will know that the earth belongs to the LORD.