Bhagavad Gita 3.39

आवृत्तं ज्ञानमेतेन ज्ञानिनो नित्यवैरिणा |
कामरूपेण कौन्तेय दुष्पूरेणलेन च

Translation

The knowledge of even the most discerning gets covered by this perpetual enemy in the form of insatiable desire, which is never satisfied and burns like fire, O son of Kunti.