Verse
कर्मण्येवाधिकारस्ते मा फलेषु कदाचन ।मा कर्मफलहेतुर्भूर् मा ते संगोऽस्त्वकर्मणि ॥
Thou hast a right to action, but only to action, never to its fruits; let not the fruits of thy works be thy motive, neither let there be in thee any attachment to inactivity.
Gītā 2·47