If by killing a single individual a family may be saved, or, if by killing a single family the whole kingdom may be saved, such an act of slaughter is not sinful.
एकं हत्वा यदि कुले शिष्टानां स्यादनामयम्। कुलं हत्वा च राष्ट्रं च न तद् वृत्तोपघातकम्॥