Chapter 4 · verse 20 · gita.yoga.org

Bhagavad Gita 4.20

त्यक्त्वा कर्मफलासङ्गं नित्यतृप्तो निराश्रयः। कर्मण्यभिप्रवृत्तोऽपि नैव किञ्चित्करोति सः

Having abandoned attachment to the fruits of the action, ever content, depending on nothing, he does not do anything even while being engaged in activity.