Mbh 12.65.1a

"'"Indra said, 'Kshatriya duties, O king, which are possessed of such energy, which include in their exercise all other duties, and which are the foremost of all duties, should be observed by persons that are, like thee, so high-souled and so employed in seeking the good of the world. If those duties are not properly discharged, all creatures would be overtaken by ruin. The kings possessed of compassion for all creatures, should regard these to be the foremost of his duties, reclaiming the land for cultivation and fertilizing it, performance of great sacrifices for cleansing himself, a disregard for begging, and protection of subjects. Abandonment (gift) is said by the sages to be the foremost of virtues. Of all kinds of abandonment, again, that of the body in battle, is the foremost. Thou hast seen with thy eyes how the rulers of the earth, ever observant of Kshatriya duties, having duly waited upon their preceptors and acquired great learning, at last cast off their bodies, engaged in battle with one another. The Kshatriya, desirous of acquiring religious merit, should, after having gone through the Brahmacharya mode, should lead a life of domesticity which is always meritorious. In adjudicating upon ordinary questions of right (between his subjects), he should be thoroughly impartial. For causing all the orders to be observant of their respective duties, for the protection they afford to all, for the diverse contrivances and means and the prowess and exertion (with which they seek the accomplishment of their objects), Kshatriya duties, which include all other duties within their scope, are said to be the foremost. The other orders are able to observe their respective duties in consequence of kingly duties. For this reason the former are said to be dependent upon the latter in respect of the merit they produce.