Bhagavad Gita 18.9

कार्यमित्येव यत्कर्म नियतं क्रियतेऽर्जुन |
सङ्गं त्यक्त्वा फलं चैव स त्याग: सात्त्विको मत:

Translation

When actions are undertaken in response to duty, and one relinquishes attachment to any reward, O Arjun, it is considered renunciation in the nature of goodness.