Chapter 2 · verse 19 · gita.yoga.org
Bhagavad Gita 2.19
य एनं वेत्ति हन्तारं यश्चैनं मन्यते हतम्। उभौ तौ न विजानीतो नायं हन्ति न हन्यते
He who takes the Self to be the slayer and he who thinks it is slain, neither of them knows. It does not slay, nor is it slain.