Chapter 11 · The Vision of the Universal Form · Krishna said
Bhagavad Gita 11.33 — Be only an instrument
तस्मात्त्वमुत्तिष्ठ यशो लभस्व जित्वा शत्रून् भुङ्क्ष्व राज्यं समृद्धम्। मयैवैते निहताः पूर्वमेव निमित्तमात्रं भव सव्यसाचिन् ॥
tasmāttvamuttiṣṭha yaśo labhasva jitvā śatrūn bhuṅkṣva rājyaṃ samṛddham | mayaivaite nihatāḥ pūrvameva nimittamātraṃ bhava savyasācin ||
Meaning
So rise up and win glory; defeat your enemies and enjoy a prosperous kingdom. They have already been slain by me; you, Arjuna, be only the instrument.
In today's life
Do your part with full effort, but see yourself as an instrument of a larger plan rather than its owner.