athaitadapyaśakto'si kartuṃ madyogamāśritaḥ |sarvakarmaphalatyāgaṃ tataḥ kuru yatātmavān ||
And if you are unable to do even this, then, taking refuge in my yoga, give up the fruit of all actions with self-control.
Explanation
Krishna is giving Arjuna a series of options for those who find the earlier paths too hard. Here he offers a further step: act, but let go of the fruit of action (karma-phala-tyāga), staying self-controlled (yatātman) and resting in his yoga, meaning steady devotion and discipline. Traditions differ on emphasis: some read this as devotion-based surrender to God, others as the discipline of non-attachment in action.