Chapter 1 · verse 35 · gita.yoga.org

Bhagavad Gita 1.35

एतान्न हन्तुमिच्छामि घ्नतोऽपि मधुसूदन। अपि त्रैलोक्यराज्यस्य हेतोः किं नु महीकृते

These I do not wish to kill, O Krishna, even though they kill me, for the sake of dominion over the three worlds; leave alone killing them for the sake of the earth."