Bhagavad Gita – Chapter 2, Verse 47
कर्मण्येवाधिकारस्ते मा फलेषु कदाचन।
मा कर्मफलहेतुर्भूर्मा ते सङ्गोऽस्त्वकर्मणि॥
Karmany-evadhikaras te Ma phaleshu kadachana
Ma karma-phala-hetur bhur Ma te sango’stvakarmani
“You have the right to perform your prescribed duty, but you are not entitled to the results of your actions. Never consider yourself the cause of the results, and never be attached to not doing your duty.”