Bhagavad Gita 3.39

आवृतं ज्ञानमेतेन ज्ञानिनो नित्यवैरिणा।कामरूपेण कौन्तेय दुष्पूरेणानलेन च ॥३.३९॥

āvṛtaṃ jñānametena jñānino nityavairiṇākāmarūpeṇa kaunteya duṣpūreṇānalena ca

O Arjuna, wisdom is enveloped by this constant enemy of the wise, in the form of desire, which is insatiable like fire.

गीता