רַ֚ק בְּאֶ֣רֶץ גֹּ֔שֶׁן אֲשֶׁר־שָׁ֖ם בְּנֵ֣י יִשְׂרָאֵ֑ל לֹ֥א הָיָ֖ה בָּרָֽד׃
Only in the land of Goshen, where the children of Israel were, was there no hail.
Read kabbalistic (mystical) interpretation of Exodus 9:26: and classical mystical sources.