The words "cut off ... strength" are probably a euphemism for the death of strong, young men; the words "your father's house" are a metonymy for "your family." AT: "I will kill you and all strong, young male descendants in your family" (See: [[rc://en/ta/man/translate/figs-euphemism]] and [[rc://en/ta/man/translate/figs-metonymy]])