Chapter 3 · verse 43 · gita.yoga.org

Bhagavad Gita 3.43

एवं बुद्धेः परं बुद्ध्वा संस्तभ्यात्मानमात्मना। जहि शत्रुं महाबाहो कामरूपं दुरासदम्

Thus, knowing Him who is superior to the intellect and restraining the self by the Self, slay thou, O mighty-armed Arjuna, the enemy in the form of desire, hard to conquer.