Sanskrit

नियतं कुरु कर्म त्वं कर्म ज्यायो ह्यकर्मणः। शरीरयात्रापि च ते न प्रसिद्ध्येदकर्मणः।।3.8।।

Summary

Do your duty as prescribed, for action for duty's sake is superior to inaction. Even the maintenance of the body would be impossible if one remained inactive.