Bhagavad Gita 3.25

सक्ता: कर्मण्यविद्वांसो यथा कुर्वन्ति भारत |
कुर्याद्विद्वंस्तथासक्तश्चिकिरशूरलोकसंग्रहम्

Translation

As ignorant people perform their duties with attachment to the results, O scion of Bharat, so should the wise act without attachment, for the sake of leading people on the right path.