And this will be a sign for you from the Lord, that the Lord will do this word, which he has spoken
Other versions
King James Version
And this shall be a sign unto thee from the LORD, that the LORD will do this thing that he hath spoken;English Standard Version
"This shall be the sign to you from the LORD, that the LORD will do this thing that he has promised:New International Version
"'This is the LORD's sign to you that the LORD will do what he has promised: