Bhagavad Gita 3.25
सक्ताः कर्मण्यविद्वांसो यथा कुर्वन्ति भारत। कुर्याद्विद्वांस्तथासक्तश्चिकीर्षुर्लोकसंग्रहम्।।3.25।।
saktāḥ karmaṇyavidvāṃso yathā kurvanti bhārata| kuryādvidvāṃstathāsaktaścikīrṣurlokasaṃgraham||3.25||
saktah karmanyavidvamso yatha kurvanti bharata kuryadvidvamstathasaktashcikirshurlokasamgraham3.25
Meaning
Just as the ignorant act with attachment, the wise should act without attachment for the welfare of the world. The enlightened guide others by their example, not by disturbing the faith of the unenlightened.
हे भारत! कर्म में आसक्त हुए अज्ञानीजन जैसे कर्म करते हैं वैसे ही विद्वान् पुरुष अनासक्त होकर, लोकसंग्रह (लोक कल्याण) की इच्छा से कर्म करे।
This is verse 25 of 43 in Chapter 3 (Karma Yoga) of the Bhagavad Gita.