Exodus 9:6

“But on that day I will make a distinction for the land of Goshen, where My people are living, so that no swarms of flies will be there, that you may know that I, Yahweh, am in the midst of the land.

“But Yahweh will make a distinction between the livestock of Israel and the livestock of Egypt, so that nothing will die of all that belongs to the sons of Israel.”’”

“So now, send, bring your livestock and whatever you have in the field to safety. Every man and beast that is found in the field and is not brought home, the hail will come down on them, and they will die.”’”

Only in the land of Goshen, where the sons of Israel were, there was no hail.

Now it happened at midnight that Yahweh struck all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the dungeon, and all the firstborn of cattle.

“Then You performed signs and wonders against Pharaoh, Against all his servants and all the people of his land; For You knew that they acted presumptuously toward them, And made a name for Yourself as it is this day.