Bhagavad Gita · 2.18

अन्तवन्त इमे देहा नित्यस्योक्ताः शरीरिणः।अनाशिनोऽप्रमेयस्य तस्माद्युध्यस्व भारत॥

antavanta ime dehā nityasyoktāḥ śharīriṇaḥ anāśhino 'prameyasya tasmād yudhyasva bhārata

Only the material body of the eternal, indestructible, and immeasurable soul is subject to destruction. Therefore, fight, O Bharata!

— Bhagavad Gita 2.18

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)