1 Chronicles 18:13-17

Then he put garrisons in Edom, and all the Edomites became servants to David. And the Lord helped David wherever he went.

So David reigned over all Israel; and he administered justice and righteousness for all his people.

Joab the son of Zeruiah was over the army, and Jehoshaphat the son of Ahilud was secretary;

and Zadok the son of Ahitub and Abimelech the son of Abiathar were priests, and Shavsha was secretary;

and Benaiah the son of Jehoiada was over the Cherethites and the Pelethites, and the sons of David were chiefs at the king’s side.