Bhagavad Gita: Verse 5.11
कायेन मनसा बुद्ध्या केवलैरिन्द्रियैरपि ।
योगिनः कर्म कुर्वन्ति सङ्गं त्यक्त्वात्मशुद्धये ॥ ५-११॥
kāyena manasā buddhyā kevalairindriyairapi
yoginaḥ karma kurvanti saṅgaṃ tyaktvātmaśuddhaye
YOGIS, having abandoned attachment, perform actions merely by the body, mind, intellect and senses, for the purification of the self (ego) .
kāyena = with the body; manasā = with the mind; buddhyā = with the intelligence; kevalaiḥ = purified; indriyaiḥ = with the senses; api = even; yoginaḥ = Krishna conscious persons; karma = actions; kurvanti = they perform; saṅgaṃ = attachment; tyaktvā = giving up; ātma = of the self; śuddhaye = for the purpose of purification.;