Goshen: A District in Egypt Especially Suitable for Herds and Flocks: Exempted from Plagues

But on that day I will give special treatment to the land of Goshen, where My people live; no swarms of flies will be found there. In this way you will know that I, the LORD, am in the land.

The only place where it did not hail was in the land of Goshen, where the Israelites lived.