Chapter 4 · Knowledge and Renunciation of Action · Krishna said
Bhagavad Gita 4.16 — What is action?
किं कर्म किमकर्मेति कवयोऽप्यत्र मोहिताः। तत्ते कर्म प्रवक्ष्यामि यज्ज्ञात्वा मोक्ष्यसेऽशुभात् ॥
kiṃ karma kimakarmeti kavayo'pyatra mohitāḥ | tatte karma pravakṣyāmi yajjñātvā mokṣyase'śubhāt ||
Meaning
What is action and what is inaction? Even the wise are confused about this. I will explain action to you, and knowing it you will be freed from harm.