NET

6 I will add fifteen years to your life and rescue you and this city from the king of Assyria. I will shield this city for the sake of my reputation and because of my promise to David my servant.”’”

Darby

6 and I will add to thy days fifteen years; and I will deliver thee and this city out of the hand of the king of Assyria, and I will defend this city for mine own sake, and for my servant David's sake.

KJV

6 And I will add unto thy days fifteen years; and I will deliver thee and this city out of the hand of the king of Assyria; and I will defend this city for mine own sake, and for my servant David's sake.