BG 2.19
य एनं वेत्ति हन्तारं यश्चैनं मन्यते हतम्। उभौ तौ न विजानीतो नायं हन्ति न हन्यते
ya enaṁ vetti hantāraṁ yaśh chainaṁ manyate hatam ubhau tau na vijānīto nāyaṁ hanti na hanyate
He who thinks that the Spirit kills, and he who thinks of it as killed, are both ignorant. The Spirit neither kills nor is it killed.
Translated by Shri Purohit Swami
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.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
yaḥ—one who; enam—this; vetti—knows; hantāram—the slayer; yaḥ—one who; cha—and; enam—this; manyate—thinks; hatam—slain; ubhau—both; tau—they; na—not; vijānītaḥ—in knowledge; na—neither; ayam—this; hanti—slays; na—nor; hanyate—is killed