Cāturāśramya-dharma—Marks of the Four Āśramas (चातुराश्रम्यधर्मः)
सर्वोद्योगैराश्रमं धर्ममाहु: क्षात्रं श्रेष्ठ सर्वधर्मोपपन्नम् । स्व॑ स्व॑ धर्म येन चरन्ति वर्णा- स्तांस्तान् धमनन्यथार्थान् वदन्ति
sarvodyogair āśramaṃ dharmam āhuḥ kṣātraṃ śreṣṭhaṃ sarvadharmopapannam | svaṃ svaṃ dharmaṃ yena caranti varṇās tāṃs tān dharmān anyathārthān vadanti ||
Indra said: By every kind of sustained effort, people declare the kṣātra order—royal power exercised as a dharma—to be the foremost, complete with all the requisites of righteousness. For it is with the support of that kṣātra-dharma that the various social orders are able to practice their own respective duties. They therefore say that, without the kṣātra-dharma, those very duties lose their proper purpose and turn contrary to their intended ends.
इन्द्र उवाच
The verse teaches that righteous kingship (kṣātra-dharma) is foundational for society: it enables each varṇa to perform its own duties safely and meaningfully; without it, other dharmas become ineffective or even counterproductive.
Indra is explaining a principle of rajadharma within the Śānti Parva discourse: he argues for the primacy of the kṣātra function—protection, enforcement of order, and governance—as the support-system that allows all other life-duties and social obligations to operate.