Vyasa said 'O you having eyes like lotus petals, the protection of subjects is the duty of kings. Those men who are always observant of duty regard duty to be all powerful.
व्यास उवाच प्रजानां पालनं धर्मो राज्ञां राजीवलोचन। धर्मः प्रमाणं लोकस्य नित्यं धर्मानुवर्तिनः॥