Chapter 4 · verse 22 · gita.yoga.org
Bhagavad Gita 4.22
यदृच्छालाभसन्तुष्टो द्वन्द्वातीतो विमत्सरः। समः सिद्धावसिद्धौ च कृत्वापि न निबध्यते
Content with what comes to him without effort, free from the pairs of opposites and envy, even-minded in success and failure, he acts yet is not bound.