Bhagavad Gita Chapter 18 Verse 16
तत्र, एवम्, सति, कर्तारम्, आत्मानम्, केवलम्, तु, यः,
पश्यति, अकृतबुद्धित्वात्, न, सः, पश्यति, दुर्मतिः।।16।।
Tatr, evam’, sati, kartaarm’, aatmaanm’, kevalam’, tu, yaH,
Pashyati, akritbuddhitvaat’, na, saH, pashyati, durmatiH ||16||
Translation: (Tu) but (evam’) this (sati) even on being the case (yaH) a person who (akritbuddhitvaat’) because of having impure intellect (tatr) in that matter i.e. in the performance of actions (kevalam’) only (aatmaanm’) soul (kartaarm’) doer (pashyati) considers (saH) that (durmatiH) foolish, ignorant person (na, pashyati) does not perceive the truth. (16)
Translation: But even on this being the case, a person who because of having impure intellect only considers the soul as the doer in that matter i.e. in the performance of actions, that foolish, ignorant person does not perceive the truth.