Brāhmaṇa-bheda-nirṇaya and Rājā’s Regulatory Duties (ब्राह्मणभेदनिर्णयः)
जन्मकर्मविहीना ये कदर्या ब्रह्म॒बन्धव: । एते शूद्रसमा राजन ब्राह्मणानां भवन्त्युत
janma-karmavihīnā ye kadaryā brahma-bandhavaḥ | ete śūdra-samā rājan brāhmaṇānāṁ bhavanty uta ||
Bhishma said: “O King, those who are devoid of the duties proper to their birth and conduct, and who, being base, live by contemptible actions—such ‘kinsmen of Brahmins’ who have fallen from true Brahminhood are, among Brahmins, to be regarded as equal to Shudras.”
भीष्म उवाच
Status as a ‘Brahmin’ is not upheld by birth-label alone; it is validated by adherence to the duties and ethical conduct appropriate to that station. When one abandons those duties and engages in blameworthy acts, one is treated—within the moral-social framework of the text—as equivalent to a Shudra.
In the Shanti Parva’s instruction on dharma, Bhishma addresses King Yudhishthira and explains criteria for evaluating people within the varna framework, emphasizing conduct and duty as the measure, and describing the category ‘brahma-bandhu’ for those who have fallen from Brahmin standards.