2 Samuel 20:10 NIV

10 Amasa was not on his guard against the dagger1 in Joab's2 hand, and Joab plunged it into his belly, and his intestines spilled out on the ground. Without being stabbed again, Amasa died. Then Joab and his brother Abishai pursued Sheba son of Bicri.

References for 2 Samuel 20:10