He who takes up a weapon and kills an arined enemy advancing against him, does not incur the sin of killing a man, for it is the anger of the advancing enemy that excites the anger of the destroyer.
आततायी हि यो हन्यादाततायिनमागतम्। न तेन भ्रूणहा स स्यान्मन्युस्तं मन्युमार्छति॥