Exodus 9:18-19

So at this time tomorrow, I will cause a very bad hailstorm. There has never been a hailstorm like this in Egypt, not since Egypt became a nation. Now, you must put your animals in a safe place. Everything you own that is now in the fields must be put in a safe place. Any person or animal that remains in the fields will be killed. The hail will fall on everything that is not gathered into your houses.’”