Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
सप्तद्वीपा वसुमती सशैलवनकानना धर्मेण पालिता तेन सर्वलोकहितैषिणा //
saptadvīpā vasumatī saśailavanakānanā dharmeṇa pālitā tena sarvalokahitaiṣiṇā //
That earth—comprising the seven continents, with its mountains, forests, and groves—was protected by him through dharma, for he sought the welfare of all worlds.
This verse does not address pralaya directly; it emphasizes stable, dharma-based protection of the earth and its natural domains (mountains and forests) as the mark of an ideal ruler.
It defines the ruler’s duty as dharmic protection (पालन) aimed at universal welfare—governing for the benefit of all, including safeguarding natural resources like forests and mountains, rather than for personal gain.
No explicit Vāstu or ritual procedure appears here; the takeaway relevant to Vāstu-ethics is the conservation-minded duty to protect land, forests, and sacred landscapes that often frame temple and settlement planning.