Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
अनयोर्विजयी कः स्याद् रजिर्यत्रेति सो ऽब्रवीत् जयाय प्रार्थितो राजा सहायस्त्वं भवस्व नः //
anayorvijayī kaḥ syād rajiryatreti so 'bravīt jayāya prārthito rājā sahāyastvaṃ bhavasva naḥ //
“Which of these two will be the victor, and where will the battle be fought?”—so he asked. Then the king, being entreated for victory, said, “Become our ally.”
This verse is not about Pralaya; it belongs to a royal narrative context focused on conflict, victory, and alliance rather than cosmic dissolution.
It reflects a king’s political duty to secure victory and protect his side through alliances—an aspect of rājadharma where counsel, support, and strategic partnership are sought in times of war.
No Vāstu/temple-building rule is stated here; the only ritual-like element is the idea of being “prārthitaḥ for victory,” implying victory-invocation or petitioning support, not architectural procedure.