Bhagwad Gita
Chapter 3, Verse 38
धूमेनाव्रियते वह्निर्यथाऽऽदर्शो मलेन च।
यथोल्बेनावृतो गर्भस्तथा तेनेदमावृतम्।।3.38।।
As fire is covered by smoke, as a mirror is covered by dust, or as the embryo is covered by the womb, similarly, the living entity is covered by different degrees of this lust.