Exodus 9:22-23

22Now the Lord said to Moses, “Stretch out your hand [with your staff] toward the sky, so that there may be hail in all the land of Egypt, on man and on animal and on all the vegetation of the field, throughout the land of Egypt.”

23Moses stretched out his staff toward the sky, and the Lord sent thunder and hail, and lightning (fireballs) ran down to the earth and along the ground. And the Lord rained hail on the land of Egypt.