Bhagavad Gita · 3.27

प्रकृतेः क्रियमाणानि गुणैः कर्माणि सर्वशः।अहङ्कारविमूढात्मा कर्ताहमिति मन्यते॥

prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśhaḥ ahaṅkāra-vimūḍhātmā kartāham iti manyate

All actions are performed by the modes of material nature. But a person deluded by ego thinks, 'I am the doer.'

— Bhagavad Gita 3.27

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