Bhagavad Gita · 5.8

नैव किञ्चित्करोमीति युक्तो मन्येत तत्त्ववित्।पश्यञ्शृण्वन्स्पृशञ्जिघ्रन्नश्नन्गच्छन्स्वपञ्श्वसन्॥

naiva kiñchit karomīti yukto manyeta tattva-vit paśhyañ śhṛṇvan spṛśhañ jighran naśhnan gachchhan svapañ śhvasan

The knower of truth, though seeing, hearing, touching, smelling, eating, walking, sleeping, and breathing, always knows within that 'I do nothing at all.'

— Bhagavad Gita 5.8

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