Absalom had appointed Amasa over the army in place of Joab. Amasa was the son of Jether, an Ishmaelite who had married Abigail, the daughter of Nahash and sister of Zeruiah the mother of Joab.
And say to Amasa, ‘Are you not my own flesh and blood? May God deal with me, be it ever so severely, if you are not the commander of my army for life in place of Joab.’ ”