2SA 20:10

10 and Amasa hath not been watchful of the sword that [is] in the hand of Joab, and he smiteth him with it unto the fifth [rib], and sheddeth out his bowels to the earth, and he hath not repeated [it] to him, and he dieth; and Joab and Abishai his brother have pursued after Sheba son of Bichri.