Chapter II Sloka 48

yaegSw> k…é kmaRi[ s¼< Ty®va xn<jy,
isÏ(isÏ(ae> smae -UTva smTv< yaeg %Cyte.

yogastha× kuru karm˜õi 
saðgaÕ tyaktv˜ dhanañjaya |
siddhyasiddhyo× samo 
bh¨tv˜ samatvaÕ yoga ucyate ( 2|48)||

Perform action, O Arjuna, being steadfast in Yoga, abandoning attachment and balanced in success and failure. Evenness of mind is called Yoga.