Bhagavad Gita 5.11

The sage performs his action dispassionately, using his body, mind, intellect, and even his senses, always as a means for purification.

कायेन मनसा बुद्ध्या केवलैरिन्द्रियैरपि।
योगिनः कर्म कुर्वन्ति सङ्गं त्यक्त्वाऽऽत्मशुद्धये॥

kāyena manasā buddhyā kevalairindriyairapi|
yoginaḥ karma kurvanti saṅgaṃ tyaktvā''tmaśuddhaye||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).