Bhagwad Gita
Chapter 12, Verse 8
मय्येव मन आधत्स्व मयि बुद्धिं निवेशय।निवसिष्यसि मय्येव अत ऊर्ध्वं न संशयः।।12.8।।
Just fix your mind upon Me, the Supreme Personality of Godhead, and engage all your intelligence in Me. Thus you will live in Me always, without a doubt.