Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.13 — Five causes of action
पञ्चैतानि महाबाहो कारणानि निबोध मे। साङ्ख्ये कृतान्ते प्रोक्तानि सिद्धये सर्वकर्मणाम् ॥
pañcaitāni mahābāho kāraṇāni nibodha me | sāṅkhye kṛtānte proktāni siddhaye sarvakarmaṇām ||
Meaning
O mighty Arjuna, learn from Me the five causes behind every action, as taught in the Sankhya philosophy.