Bhagwad Gita
Chapter 18, Verse 24
यत्तु कामेप्सुना कर्म साहङ्कारेण वा पुनः।क्रियते बहुलायासं तद्राजसमुदाहृतम्।।18.24।।
But action performed with great effort by one seeking to gratify his desires, and which is enacted from a sense of false ego, is called action in the mode of passion.