Mbh 12.15.2a

"'Arjuna said, "The man armed with the rod of chastisement governs all subjects and protects them. The rod of chastisement is awake when all else is sleep. For this, the wise have characterised the rod of chastisement to be Righteousness itself. The rod of chastisement protects Righteousness and Profit. It protects also, O king! For this, the rod of chastisement is identified with the triple objects of life. Corn and wealth are both protected by the rod of chastisement. Knowing this, O thou that art possessed of learning, take up the rod of chastisement and observe the course of the world. One class of sinful men desist from sin through fear of the rod of chastisement in the king's hands. Another class desist from similar acts through fear of Yama's rod, and yet another from fear of the next world. Another class of persons desist from sinful acts through fear of society. Thus, O king, in this world, whose course is such, everything is dependent on the rod of chastisement. There is a class of persons who are restrained by only the rod of chastisement from devouring one another. If the rod of chastisement did not protect people, they would have sunk in the darkness of hell. The rod of chastisement (danda) has been so named by the wise because it restrains the ungovernable and punishes the wicked. The chastisement of Brahmanas should be by word of mouth; of Kshatriyas, by giving them only that much of food as would suffice for the support of life; of Vaisyas, by the imposition of fines and forfeitures of property, while for Sudras there is no punishment.[34] For keeping men awake (to their duties) and for the protection of property, ordinances, O king, have been established in the world, under the name of chastisement (or punitive legislation). Thither where chastisement, of dark complexion and red eyes, stands in an attitude of readiness (to grapple with every offender) and the king is of righteous vision, the subjects never forget themselves.