Bhagavad Gita Chapter 3 Verse 39

Gita 3.39

आवृतम्, ज्ञानम्, एतेन, ज्ञानिनः, नित्यवैरिणा,
कामरूपेण, कौन्तेय, दुष्पूरेण, अनलेन, च।।39।।

Gita 3.39

Aavrtm’, gyanm’, eten, gyaninH, nityavairina,
Kaamroopen, kauntey, dushpooren, anlen, ch ||39||

Translation: (Ch) and (kauntey) O son of Kunti, Arjun! (eten) this (anlen) like fire (dushpooren) never satiable (kaamroopen) in the form of sexual pleasure i.e. sex-like (gyaninH) knowledgeable persons’ (nityavairina) by constant enemy; a man’s (gyanm’) knowledge (aavrtm’) is covered. (39)

Bhagavad Gita Chapter 3 Verse 39

And O son of Kunti, Arjun! The knowledge of man is covered by the sex-like eternal enemy of the knowledgeable persons which can never be satiated like this fire.