Now Abishai, the brother of Joab, the son of Zeruiah, was chief of the thirty. And he wielded his spear against three hundred men and slew them, and won a name beside the three.
And when the Ammonites saw that the Syrians fled, they likewise fled before Abishai, and entered the city. Then Joab returned from fighting against the Ammonites, and came to Jerusalem.
And David sent forth the army, one third under the command of Joab, one third under the command of Abishai the son of Zeruiah, Joab's brother, and one third under the command of Ittai the Gittite. And the king said to the men, “I myself will also go out with you.”
But Amasa did not observe the sword which was in Joab's hand; so Joab struck him with it in the body, and shed his bowels to the ground, without striking a second blow; and he died. Then Joab and Abishai his brother pursued Sheba the son of Bichri.