In which land, where the Israelites lived, were there no flies and no hail during the plagues?

Answer: Goshen

God set apart the land of Goshen, where His people lived: no swarms of flies came there, and it was the only place without hail.

“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.”— Exodus 8:22, 9:26 (BSB)