2 Samuel 8:16-18
16 Joab son of Zeruiah was head of the army;
Jehoshaphat son of Ahilud was clerk;
17 Zadok son of Ahitub and Ahimelech son of Abiathar were priests;
Seraiah was secretary;
18 Benaiah son of Jehoiada was over the Kerethites and Pelethites;
And David’s sons were priests.