Bhagavad Gita 8.7

Therefore, always meditate on Me and fight; if your mind and reason are fixed on Me, you will surely come to Me.

तस्मात्सर्वेषु कालेषु मामनुस्मर युध्य च।
मय्यर्पितमनोबुद्धिर्मामेवैष्यस्यसंशयम्॥

tasmātsarveṣu kāleṣu māmanusmara yudhya ca|
mayyarpitamanobuddhirmāmevaiṣyasyasaṃśayam||

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