Bhagavad Gita 5.11

कायेन मनसा बुद्ध्या केवलैरिन्द्रियैरपि |
योगिनः कर्म कुर्वन्ति सङ्गं त्यक्तत्वशुद्धये

Translation

The yogis, while giving up attachment, perform actions with their body, senses, mind, and intellect, only for the purpose of self-purification.