2 Samuel 8:16

And Joab the son of Zeruiah and the servants of David went out and met them by the pool of Gibeon; and they sat down, one on the one side of the pool and the other on the other side of the pool.

“And say to Amasa, ‘Are you not my bone and my flesh? May God do so to me, and more also, if you will not be commander of the army before me continually in place of Joab.’”

Now Joab was over the whole army of Israel, and Benaiah the son of Jehoiada was over the Cherethites and the Pelethites;

Elihoreph and Ahijah, the sons of Shisha were scribes; Jehoshaphat the son of Ahilud was the recorder;

And David said, “Whoever strikes down a Jebusite first shall be chief and commander.” Joab the son of Zeruiah went up first, so he became chief.

Now it happened afterwards, that David struck the Philistines and subdued them and took Gath and its towns from the hand of the Philistines.

You have delivered me from the contentions of the people; You have placed me as head of the nations; A people whom I have not known serve me.