Stationed in discipline (yoga), perform actions (karmāṇi), Having abandoned attachment, O Winner of wealth (Dhanañjaya). Having become equal in success and failure, Equanimity is called discipline (yoga).
Perform actions, firm in discipline, relinquishing attachment; be impartial to failure and success— this equanimity is called discipline.
(48) Stand fast in Yoga, surrendering attachment; in success and failure be the same and then get busy with your works. Yoga means ‘sameness-and-indifference’. The Soul’s Practice of Contemplation again
2.48 By being established in Yoga, O Dhanañjaya (Arjuna), undertake actions, casting off attachment and remaining equipoised in success and failure. Equanimity is called Yoga.
2.48 Abandoning attachment and established in Yoga, perform works, viewing success and failure with an even mind. Evenness of mind is said to be Yoga.
2.48 Perform action, O Arjuna, being steadfast in Yoga, abandoning attachment and balanced in success and failure. Evenness of mind is called Yoga.