Matsya Purana — Inquiry into Yayāti’s Story and the Kacha–Devayānī Episode
ब्राह्मणौ ताव् उभौ नित्यम् अन्योन्यं स्पर्धिनौ भृशम् तत्र देवा निजघ्नुर्यान् दानवान् युधि संगतान् //
brāhmaṇau tāv ubhau nityam anyonyaṃ spardhinau bhṛśam tatra devā nijaghnuryān dānavān yudhi saṃgatān //
Those two brāhmaṇas were ever in fierce rivalry with one another. Thereupon, in that battle, the gods struck down the Dānavas who had assembled for war.
This verse does not describe pralaya directly; it reflects the Purāṇic mythic-historical layer where cosmic order is defended through Deva–Dānava battles, a recurring motif that frames cycles of stability within larger cosmic cycles.
By highlighting destructive rivalry (spardhā) and its escalation into violence, the verse implicitly supports the dharmic ideal that rulers and householders should restrain envy and factionalism, preserving social order and preventing conflict.
No explicit Vāstu or ritual procedure is stated in this verse; its focus is narrative—rivalry and warfare—rather than temple-building rules or iconographic prescriptions.