Matsya Purana — The Battle for Tripura: Portents
भूयोदीरितवीर्यास्ते परस्परकृतागसः पूर्वदेवाश्च देवाश्च सूदयन्तः परस्परम् //
bhūyodīritavīryāste parasparakṛtāgasaḥ pūrvadevāśca devāśca sūdayantaḥ parasparam //
Their prowess flared up again; having wronged one another, the former gods and the (present) gods began to slay each other in mutual combat.
It does not describe Pralaya directly; it highlights cyclical cosmic disorder within a Manvantara—when accumulated offenses provoke renewed conflict even among divine beings.
By showing that even the powerful fall into ruin through mutual wrongdoing, it reinforces the Rajadharma ethic of restraint, reconciliation, and avoiding retaliatory escalation that multiplies guilt (āgas) and violence.
No Vastu or ritual procedure is stated in this verse; its takeaway is ethical and cosmological—conflict arises from mutual transgression, not from temple-building or rite-specific rules.