Chapter 6 · verse 2 · gita.yoga.org

Bhagavad Gita 6.2

यं संन्यासमिति प्राहुर्योगं तं विद्धि पाण्डव। न ह्यसंन्यस्तसङ्कल्पो योगी भवति कश्चन

Do you, O Arjuna, know that Yoga is what they call renunciation; no one indeed becomes a Yogi who has not renounced their thoughts.