2 Samuel 19:13-14

13And David told them to tell Amasa, “Since you are my own flesh and blood, like Joab, may God strike me and even kill me if I do not appoint you as commander of my army in his place.”

14Then Amasa convinced all the men of Judah, and they responded unanimously. They sent word to the king, “Return to us, and bring back all who are with you.”