Exodus 9:15-19

For had I now put out My hand and struck you and your people with plague, you would then have been eliminated from the earth.

But indeed, for this reason I have allowed you to remain, in order to show you My power and in order to proclaim My name throughout the earth.

Still you exalt yourself against My people by not letting them go. The Plague of Hail

Behold, about this time tomorrow, I will send a very heavy hail, such as has not been seen in Egypt from the day it was founded until now.

So now, send word, bring your livestock and whatever you have in the field to safety. Every person and animal that is found in the field and is not brought home, when the hail comes down on them, will die.” ’ ”