The Yoga of Liberation by Renunciation

Krishna begins explaining the three kinds of action, starting with sattvic action. 'Niyataṁ saṅga-rahitam arāga-dveṣataḥ kṛtam'—that action which is prescribed (niyatam), performed (kṛtam) without attachment (saṅga-rahitam), without desire and aversion (arāga-dveṣataḥ). 'Aphala-prepṣunā karma yat tat sāttvikam ucyate'—by one who does not desire fruits (aphala-prepṣunā), that action (yat karma) is called (ucyate) sattvic (sāttvikam). This is sattvic action: performing prescribed duty (yajña, dāna, tapaḥ) without attachment, without desire or aversion, without desiring fruits. This is the highest kind of action: duty-based, detached, balanced. You perform what you should perform (niyatam) because it's your duty, not because you're attached to it or want specific results. This is the path: duty without attachment to action or fruits, without desire or aversion.