Bhagavad Gita 5.11
कायेन मनसा बुद्ध्या केवलैरिन्द्रियैरपि।
योगिनः कर्म कुर्वन्ति सङ्गं त्यक्त्वाऽऽत्मशुद्धये।।5.11।।
Kayena manasa buddhya kevalairindriyairapi
Yoginah karma kurvanti sangam tyaktvatmashuddhaye
Simple meaning, written by AIYogis perform actions with the body, mind, intellect and even the senses alone, giving up attachment, for the purification of the self.