King James Version
I will therefore put you in remembrance, though ye once knew this, how that the Lord, having saved the people out of the land of Egypt, afterward destroyed them that believed not.English Standard Version
Now I want to remind you, although you once fully knew it, that Jesus, who saved a people out of the land of Egypt, afterward destroyed those who did not believe.New International Version
Though you already know all this, I want to remind you that the Lord delivered his people out of Egypt, but later destroyed those who did not believe.