Chapter 18 · verse 9 · gita.yoga.org

Bhagavad Gita 18.9

कार्यमित्येव यत्कर्म नियतं क्रियतेऽर्जुन।सङ्गं त्यक्त्वा फलं चैव स त्यागः सात्त्विको मतः

Whatever obligatory action is done, O Arjuna, merely because it ought to be done, abandoning attachment and also the desire for reward, that renunciation is regarded as sattvic (pure).