Bhagavad Gita 11.33

Then gird up your loins and conquer. Subdue your foes and enjoy the kingdom in prosperity. I have already doomed them. Be thou my instrument, Arjuna!

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||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).