Matsya Purana — The Terror of Tripura and the Gods’ Hymn to Śiva
वरगुप्तास्तवैवेह दानवास्त्रिपुरालयाः बाधन्ते ऽस्मान्यथा प्रेष्यान् अनुशाधि ततो ऽनघ //
varaguptāstavaiveha dānavāstripurālayāḥ bādhante 'smānyathā preṣyān anuśādhi tato 'nagha //
Though sheltered by your boons, the Dānavas dwelling in Tripura still torment us here, treating us as mere servants. Therefore, O sinless one, instruct us as to what should be done.
This verse is not about pralaya; it depicts a crisis in the cosmic order where the gods are oppressed by Tripura-dwelling Dānavas and seek divine guidance to restore balance.
It models dharmic leadership: when oppression persists despite prior safeguards (like “boons” or agreements), one should seek wise counsel and act under righteous instruction rather than tolerate injustice.
The term “Tripura” (“three cities/fortresses”) points to the mythic fortified strongholds of the Dānavas; while not a Vāstu rule itself, it is often read alongside discussions of strongholds/cities in Purāṇic literature.