Synonyms:

karmani–prescribed duties; eva–certainly; adhikarah–right; te–of you; ma–never; phalesu–in the fruits; kadacana–at any time; ma–never; karma-phala–in the result of the work; hetuh–cause; bhuh–become; ma–never; te–of you; sangah–attachment; astu–be there; akarmani–in not doing.

Translation:

You have a right to perform your prescribed duty, but you are not entitled to the fruits of action. Never consider yourself to be the cause of the results of your activities, and never be attached to not doing your duty.