Bhagavad Gita 3.8
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.
नियतं कुरु कर्म त्वं कर्म ज्यायो ह्यकर्मणः।
शरीरयात्रापि च ते न प्रसिद्ध्येदकर्मणः॥niyataṃ kuru karma tvaṃ karma jyāyo hyakarmaṇaḥ|
śarīrayātrāpi ca te na prasiddhyedakarmaṇaḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).