Menial service is the duty of the Shudra; agriculture is that of the Vaishya; the science of punishment of the Kshatriya and Brahmacharya, penances, Mantras, and truth, belong to the Brahmana. or
कर्म शूद्रे कृषिवैश्ये दण्डनीतिश्च राजनि। ब्रह्मचर्यं तपो मन्त्राः सत्यं चापि द्विजातिषु॥