The only place where it did not hail was in the land of Goshen, where the Israelites lived.
The threatened plague of hail is here summoned by the powerful hand and rod of Moses (Exo 9:22, Exo 9:23), and it obeys the summons, or rather the divine command; for fire and hail fulfil God's word, Psa 148:8. And here we are told, I. What desolations it made upon the earth.
Commenting on Exodus 9:22-35
Only in the land of Goshen, where the children of Israel were, was there no hail. So that such Egyptians as might dwell among them, they, their servants, their cattle, and their fruits, escaped this plague; and oftentimes do wicked men fare the better for the people of God that are among them. Only in the land of Goshen, where the children of Israel were, was there no hail.
PLAGUE OF HAIL. (Exo. 9:18-35) I will cause it to rain a very grievous hail, &c.--The seventh plague which Pharaoh's hardened heart provoked was that of hail, a phenomenon which must have produced the greatest astonishment and consternation in Egypt as rain and hailstones, accompanied by thunder and lightning, were very rare occurrences.
Commenting on Exodus 9:18-35