Bhagavad-gītā 3.8
BG 3.8
Open the full passageनियतं कुरु कर्म त्वं कर्म ज्यायो ह्यकर्मणः । शरीरयात्रापि च ते न प्रसिद्ध्येदकर्मणः ॥८॥
Sanskrit
niyataṁ kuru karma tvaṁ karma jyāyo hy akarmaṇaḥ śarīra-yātrāpi ca te na prasiddhyed akarmaṇaḥ
Translation
Perform your prescribed duty, for doing so is better than not working. One cannot even maintain one's physical body without work.