'Fifth' in the Bible

And he refuseth to turn aside, and Abner smiteth him with the hinder part of the spear unto the fifth rib, and the spear cometh out from behind him, and he falleth there, and dieth under it; and it cometh to pass, every one who hath come unto the place where Asahel hath fallen and dieth -- they stand still.

and the fourth is Adonijah son of Haggith, and the fifth is Shephatiah son of Abital,

And Abner turneth back to Hebron, and Joab turneth him aside unto the midst of the gate to speak with him quietly, and smiteth him there in the fifth rib -- and he dieth -- for the blood of Asahel his brother.

and thither they have come, unto the midst of the house, taking wheat, and they smite him unto the fifth rib, and Rechab and Baanah his brother have escaped;

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.