Bhagavad Gita: Verse 2.19
य एनं वेत्ति हन्तारं यश्चैनं मन्यते हतम् ।
उभौ तौ न विजानीतो नायं हन्ति न हन्यते ॥ २-१९॥
ya enaṃ vetti hantāraṃ yaścainaṃ manyate hatam
ubhau tau na vijānīto nāyaṃ hanti na hanyate
He who takes the Self to be the slayer and he who thinks He is slain, neither of these knows. He slays not, nor in He slain.
yaḥ = anyone who; enaṃ = this; vetti = knows; hantāraṃ = the killer; yaḥ = anyone who; ca = also; enaṃ = this; manyate = thinks; hataṃ = killed; ubhau = both; tau = they; na = never; vijānītāḥ = are in knowledge; na = never; ayaṃ = this; hanti = kills; na = nor; hanyate = is killed.;