Bhagavad Gita 3.22

न मे पार्थास्ति कर्तव्यं त्रिषु लोकेषु किञ्चन |
नानावाप्तमवाप्तव्यं एव वर्त च कर्माणि

Translation

There is no duty for Me to do in all the three worlds, O Parth, nor do I have anything to gain or attain. Yet, I am engaged in prescribed duties.