'Sake' in the Bible

Howbeit Jehovah would not destroy Judah, for David his servant's sake, as he promised him to give unto him a lamp for his children alway.

For I will defend this city to save it, for mine own sake, and for my servant David's sake.

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.