just as he had done before, at the Red Sea, which he dried up until we crossed over
Other versions
King James Version
That all the people of the earth might know the hand of the LORD, that it is mighty: that ye might fear the LORD your God for ever. English Standard Version
so that all the peoples of the earth may know that the hand of the LORD is mighty, that you may fear the LORD your God forever."New International Version
He did this so that all the peoples of the earth might know that the hand of the LORD is powerful and so that you might always fear the LORD your God."