Bhagwad Gita
Chapter 18, Verse 18
ज्ञानं ज्ञेयं परिज्ञाता त्रिविधा कर्मचोदना।करणं कर्म कर्तेति त्रिविधः कर्मसंग्रहः।।18.18।।
Knowledge, the object of knowledge and the knower are the three factors which motivate action; the senses, the work and the doer comprise the threefold basis of action.