Bhagavad Gita 4.22

यदृच्छलाभासन्तुष्टो द्वंद्वतीतो विमत्सर: |
सम: सिद्धवसिद्धौ च कृत्वापि न निबध्यते

Translation

Content with whatever gain comes of its own accord, and free from envy, they are beyond the dualities of life. Being equipoised in success and failure, they are not bound by their actions, even while performing all kinds of activities.