King James Version
And the earth opened her mouth, and swallowed them up together with Korah, when that company died, what time the fire devoured two hundred and fifty men: and they became a sign.English Standard Version
and the earth opened its mouth and swallowed them up together with Korah, when that company died, when the fire devoured 250 men, and they became a warning.New International Version
The earth opened its mouth and swallowed them along with Korah, whose followers died when the fire devoured the 250 men. And they served as a warning sign.