2 Samuel 8:13-18

So David made a name for himself when he returned from killing 18,000 Arameans in the Valley of Salt. He put garrisons in Edom. In all Edom he put garrisons, and all the Edomites became servants to David. And the LORD helped David wherever he went. So David reigned over all Israel; and David administered justice and righteousness for all his people. Joab the son of Zeruiah was over the army, and Jehoshaphat the son of Ahilud was recorder. Zadok the son of Ahitub and Ahimelech the son of Abiathar were priests, and Seraiah was secretary. Benaiah the son of Jehoiada was over the Cherethites and the Pelethites; and David’s sons were chief ministers.