Mbh 12.97.2a

"'Bhishma said, "By chastising the wicked, by attaching and cherishing the good, by sacrifices and gifts, kings become pure and cleansed. It is true, kings desirous of victory afflict many creatures, but after victory they advance and aggrandise all. By the power of gifts, sacrifices, and penances, they destroy their sins, and their merit increases in order that they may be able to do good to all creatures. The reclaimer of a field, for reclaiming it, takes up both paddy-blades and weeds. His action, however, instead of destroying the blades or paddy, makes them grow more vigorously. They that wield weapons, destroy many that deserve destruction. Such extensive destruction, however, causes the growth and advancement of those that remain. He who protects people from plunder, slaughter, and affliction, in consequence of thus protecting their lives from robbers, comes to be regarded as the giver of wealth, of life, and of food. The king, therefore, by thus adoring the deities by means of a union of all sacrifices whose Dakshina is the dispelling of everybody's fear, enjoys every kind of felicity here and attains to a residence in Indra's heaven hereafter.[288] That king who, going out, fights his foes in battles that have arisen for the sake of Brahmanas and lays down his life, comes to be regarded as the embodiment of a sacrifice with illimitable presents. If a king, with his quivers full of shafts, shoots them fearlessly at his foes, the very gods do not see anyone on earth that is superior to him. In such a case, equal to the number of shafts with which he pierces the bodies of his enemies, is the number of regions that he enjoys, eternal and capable of granting every wish. The blood that flows from his body cleanses him of all his sins along with the very pain that he feels on the occasion. Persons conversant with the scriptures say that the pains a Kshatriya suffers in battle operate as penances for enhancing his merit.