Exodus 9:4, 6, 26

And the LORD shall sever between the cattle of Israel and the cattle of Egypt: and there shall nothing die of all that is the children's of Israel.

And the LORD did that thing on the morrow, and all the cattle of Egypt died: but of the cattle of the children of Israel died not one.

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