Matsya Purana — Lineage of Yayāti through Yadu and the Deeds of Kārtavīrya Arjuna
युद्धेन पृथिवीं जित्वा धर्मेणैवानुपालनम् संग्रामे वर्तमानस्य वधश्चैवाधिकाद्भवेत् //
yuddhena pṛthivīṃ jitvā dharmeṇaivānupālanam saṃgrāme vartamānasya vadhaścaivādhikādbhavet //
Having conquered the earth through war, one must thereafter protect and govern it by Dharma alone; for one engaged in battle, killing (the enemy) becomes a matter of greater necessity.
This verse does not address Pralaya; it focuses on Rajadharma—how a ruler should act in conquest, governance, and battlefield necessity.
It frames a king’s duty as twofold: conquest may occur through force, but stable rule must be grounded in Dharma—lawful protection, just administration, and ethical restraint; in active battle, however, lethal force is treated as a compelled wartime duty rather than ordinary violence.
No Vastu, temple-building, or ritual procedure is mentioned in this verse; its takeaway is political ethics: Dharma-based protection after victory.