New International Version
Therefore, at this time tomorrow I will send the worst hailstorm that has ever fallen on Egypt, from the day it was founded till now.

American Standard Version
Behold, to-morrow about this time I will cause it to rain a very grievous hail, such as hath not been in Egypt since the day it was founded even until now.

Berean Study Bible
Behold, at this time tomorrow I will rain down the worst hail that has ever fallen on Egypt, from the day it was founded until now.

Douay-Rheims Bible
Behold I will cause it to rain to morrow at this same hour, an exceeding great hail: such as hath not been in Egypt from the day that it was founded, until this present time.

English Revised Version
Behold, tomorrow about this time I will cause it to rain a very grievous hail, such as hath not been in Egypt since the day it was founded even until now.

King James Bible
Behold, to morrow about this time I will cause it to rain a very grievous hail, such as hath not been in Egypt since the foundation thereof even until now.

World English Bible
Behold, tomorrow about this time I will cause it to rain a very grievous hail, such as has not been in Egypt since the day it was founded even until now.

Young's Literal Translation
lo, I am raining about this time to-morrow hail very grievous, such as hath not been in Egypt, even from the day of its being founded, even until now.

Exodus 9:18 Additional Translations ...