Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.9 — Sattvic renunciation
कार्यमित्येव यत्कर्म नियतं क्रियतेऽर्जुन। सङ्गं त्यक्त्वा फलं चैव स त्यागः सात्त्विको मतः ॥
kāryamityeva yatkarma niyataṃ kriyate'rjuna | saṅgaṃ tyaktvā phalaṃ caiva sa tyāgaḥ sāttviko mataḥ ||
Meaning
O Arjuna, when one does one's duty simply because it should be done, letting go of attachment and reward, that is sattvic renunciation.