Yogasthah kuru karmaani - Selected Verses of Bhagavad Gita: Chapter 02, Verse 48

'Selected Verses of Bhagavad Gita' recounts only selected verses of The Gita, which Krishna has said as it is.

Bhagavad Gita: Chapter 02, Verse 48

English:

Yogasthah kuru karmaani sangam tyaktvaa dhananjaya
Siddhyasiddhyoh samo bhootvaa samatvam yoga uchyate

Sanskrit: 

योगस्थः कुरु कर्माणि संगम् त्यक्तवा धनंजय 
सिद्धिः असिद्धयोः समो भूत्वा समत्वं योग उच्यते

Oriya: 

ଯୋଗସ୍ଥ: କୁରୁ କର୍ମାଣି ସାଙ୍ଗମ୍ ତ୍ୟକ୍ତ୍ଵା ଧନଞ୍ଜୟ
ସିଦ୍ଧିଃ ଆସିଦ୍ଧ୍ୟୋ: ସମୋ ଭୂତ୍ଵା ସମତ୍ଵମ୍ ୟୋଗ ଉଚ୍ୟତେ

Selected word meaning:
yoga sthah - steadfast in yoga (of actions), kuru - perform, karmaani - your duties, sangam - attachment, tyaktvaa - giving up, dhananjaya - O conqerer of wealth (Arjuna), siddhi asiddhyoh - success and failure, samah - the same bhutvaa - be equipoised, samatvam - equanimity, yogah - yoga, ucyate - is called

Translation:
O Arjuna, being steadfast in yoga of actions, perform your duties,  giving up attachment and become equipoised in success and failure. This equanimity is called yoga.

Sources:
Sermons of Gita in Mahavarat by Sri B. R. Chopra
Sermons of Gita in Sri Krishna by Sri Ramanand Sagar
Bhagavad Gita by Sri Swami Sivananda of Divine Life Society
Bhagavad Gita As it Is by Sri Swami Prabhupada of ISKCON