2 Samuel 8:15-18

So David reigned over all Israel. And David administered justice and equity to all his people. Joab the son of Zeruiah was over the army, and Jehoshaphat the son of Ahilud was recorder, and Zadok the son of Ahitub and Ahimelech the son of Abiathar were priests, and Seraiah was secretary, and Benaiah the son of Jehoiada was over the Cherethites and the Pelethites, and David’s sons were priests.