Exodus 9:20

because you still exalt yourself against my people, that you won’t let them go.

Behold, tomorrow about this time I will cause it to rain a very grievous hail, such as has not been in Egypt since the day it was founded even until now.

Now therefore command that all of your livestock and all that you have in the field be brought into shelter. The hail will come down on every man and animal that is found in the field, and isn’t brought home, and they will die.”’”

Whoever didn’t respect the LORD’s word left his servants and his livestock in the field.

The LORD said to Moses, “Stretch out your hand toward the sky, that there may be hail in all the land of Egypt, on man, and on animal, and on every herb of the field, throughout the land of Egypt.”

Moses stretched out his rod toward the heavens, and the LORD sent thunder and hail; and lightning flashed down to the earth. The LORD rained hail on the land of Egypt.