Bhagavad Gita 14.23

उदासीनवदासीनो गुणैर्यो न विचाल्यते।गुणा वर्तन्त इत्येव योऽवतिष्ठति नेङ्गते॥

udāsīnavadāsīno guṇairyo na vicālyate |guṇā vartanta ityeva yo'vatiṣṭhati neṅgate ||

He who, seated like one unconcerned, is not moved by the dualities, and who, knowing that the dualities are active, is self-centered and does not move.

He who maintains an attitude of indifference, who is not disturbed by the qualities, who realizes that it is only they who act, and remains calm;

Our plain-language meaning of this verse is waiting for scholar review.