Chapter 5 · The Yoga of Renunciation · Krishna said
Bhagavad Gita 5.11 — Action for inner purity
कायेन मनसा बुद्ध्या केवलैरिन्द्रियैरपि। योगिनः कर्म कुर्वन्ति सङ्गं त्यक्त्वात्मशुद्धये ॥
kāyena manasā buddhyā kevalairindriyairapi | yoginaḥ karma kurvanti saṅgaṃ tyaktvātmaśuddhaye ||
Meaning
Yogis act with body, mind, intellect and even the senses alone, giving up attachment, only to purify themselves.