योगस्थः कुरु कर्माणि सङ्गं त्यक्त्त्वा धनञ्जय
सिद्धि असिद्ध्यो: समः भूत्वा समत्वम् योग उच्यते

योगस्थः कुरु कर्माणि सङ्गं त्यक्त्त्वा धनञ्जय ।
सिद्ध्यसिद्धयोः समो भूत्वा समत्वं योग उच्यते ॥२:४८॥

yogasthah kuru karmaani sangam tyaktwaa dhananjaya
siddhyasiddhayoh samo bhutwaa samatwam yoga uchyate ||2:48||

yogasthah kuru karmaani sangam tyaktwaa dhananjaya
siddhi asiddhayoh samah bhootwaa samatwam yoga uchyate

Purport Remaining engaged perform actions, giving up attachments, O Dhananjaya (Arjun). Equipoised in success and failures, becoming equanimous is called Yog (union).

योगस्थः (yogasthah) -- remaining engaged
कुरु (kuru) -- perform; carry out
कर्माणि (karmaani) -- actions; duties
सङ्गम्​ (sangam) -- associating; attaching
त्यक्त्त्वा (tyaktwaa) -- having abandoned; giving up
धनञ्जय (dhananjaya) -- Dhananjaya (Arjun)
सिद्धि (siddhi) -- success; fulfilment; perfection
असिद्ध्यो: (asiddhyoh) -- in failures
समः (samah) -- equal; equipoised
भुत्वा (bhutwaa) -- becoming; existing
समत्वम् (samatvam) -- equanimity; indifference
योग (yoga) -- union
उच्यते (uchyate) -- is called; regared as