Amasa was not on guard against the dagger in Joab’s hand, and Joab stabbed him in the stomach and spilled out his intestines on the ground. And Joab did not need to strike him again, for Amasa was dead. Then Joab and his brother Abishai pursued Sheba son of Bichri.
Jewish Publication Society of America Version (JPS1917) - 2 Samuel 20:10 >But Amasa took no heed to the sword that was in Joab's hand; so he smote him therewith in the groin, and shed out his bowels to the ground, and struck him not again; and he died. And Joab and Abishai his brother pursued after Sheba the son of Bichri.