Exodus 9:17-19

You are still against my people and do not want to let them go. So at this time tomorrow, I will send a terrible hailstorm, the worst in Egypt since it became a nation. Now send for your animals and whatever you have in the fields, and bring them into a safe place. The hail will fall on every person or animal that is still in the fields. If they have not been brought in, they will die.’ ”