Bhagwad Gita
Chapter 18, Verse 17
यस्य नाहंकृतो भावो बुद्धिर्यस्य न लिप्यते।हत्वापि स इमाँल्लोकान्न हन्ति न निबध्यते।।18.17।।
One who is not motivated by false ego, whose intelligence is not entangled, though he kills men in this world, is not the slayer. Nor is he bound by his actions.