Mahabharata 3.149.52

3.149.52

kṣatraṃ yāti tathā svargaṃ bhuvi nigrahapālanaiḥ |
samyakpraṇīya daṇḍaṃ hi kāmadveṣavivarjitāḥ |
alubdhā vigatakrodhāḥ satāṃ yānti salokatām || 52 ||

[paragraph continues] And polity must be executed through persons that are friendly; but dunces should in all affairs be excluded. In matters religious, pious men; and in matters of gain, wise men; and in guarding families, eunuchs; and in all crooked affairs, crooked men, must be employed. And the propriety or impropriety of the resolution of the enemy, as also their strength or weakness, must be ascertained through one's own as well as hostile spies. Favour should be shown to honest persons that have prudently sought protection; but lawless and disobedient individuals should be punished. And when the king justly punisheth and showeth favour, the dignity of the law is well maintained, O son of Pritha, thus have I expounded, unto thee the hard duties of kings difficult to comprehend. Do thou with equanimity observe these as prescribed for thy order. The Brahmanas attain heaven through merit, mortification of the senses, and sacrifice. The Vaisyas attain excellent state through gifts, hospitality, and religious acts. The Kshatriyas attain the celestial regions by protecting and chastising the subjects, uninfluenced by lust, malice, avarice and anger. If kings justly punish (their subjects), they go to the place whither repair meritorious persons.'