Ramanuja's Gita Bhashyam - Chapter 2 - sloka 47

The entire content of this mail is from Swami Adidevananda's translation of  Ramanuja's  Gita Bhashya, published by Ramakrishna Mission.

The Key to Yoga - 45-53

1 Gita Sloka every day - Chapter 2 - Samkhya Yoga - Sloka 47

Karmani evadhikaraste ma phaleshu kadachana I

Ma phalahetuh bhuh ma te sangah astu akarmani II sloka 47

कर्मणि एवाधिकरस्ते मा फलेषु कदाचन ।

मा फलहेतुः भूः मा ते संगः अस्तु अकर्मणि ।। श्लोक ४७ 

To work alone you have the right, and not to the fruits. Do not be impelled by the fruits of work. Nor have attachment to inaction.

As for obligatory, occasional acts taught in the vedas which are associated with some result or the other, you,  an aspirant established in sattva, have the right only to perform them; You have no right to the fruits derived  from such acts. Acts done with a desire for fruit bring about bondage. But acts done without an eye on fruits form My worship and become a means for your release. Do not become an agent of acts with the idea of being a reaper of their fruits. Even when you, who are established in pure sattva and are desirous for release, perform acts, you should not look upon yourself as the agent. 

Likewise, it is necessary to think of yourself as not being the cause of even appeasing hunger and such other bodily necessities. Later on it will be said that both the agency of action and desire for fruits, should be considered as belonging to Gunas, or in the alternative to Me, the Lord of all. Thinking thus, do work. With regard to inaction, ie, abstaining from performance of duties, (like when you said, " I will not fight"), let there be no attachment to such inaction in you. The meaning is let your interest be only in the discharge of such obligatory duties, like this war, in the manner described above. Sri Krishna makes this clearer in the next verse.