Bhagavad Gita · 3.43

एवं बुद्धेः परं बुद्ध्वा संस्तभ्यात्मानमात्मना।जहि शत्रुं महाबाहो कामरूपं दुरासदम्॥

evaṁ buddheḥ paraṁ buddhvā saṁstabhyātmānam ātmanā jahi śhatruṁ mahā-bāho kāma-rūpaṁ durāsadam

Thus knowing the Self to be superior to the intellect, O mighty-armed one, steady the self by the Self, and slay the formidable enemy in the form of desire.

— Bhagavad Gita 3.43

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)