Matsya Purana — Cosmography of Śākadvīpa and Successive Dvīpas: Mountains
तेषां निसर्गो देशानाम् आनुपूर्व्येण सर्वशः न शक्यो विस्तराद्वक्तुम् अपि वर्षशतैरपि //
teṣāṃ nisargo deśānām ānupūrvyeṇa sarvaśaḥ na śakyo vistarādvaktum api varṣaśatairapi //
The full account of the origins and orderly arrangement of those regions—everywhere and in proper sequence—cannot be explained in detail, even in a hundred years.
It does not describe Pralaya directly; it emphasizes the vastness and complexity of the world’s regions and their ordered formation, implying that a complete cosmographic account is practically inexhaustible.
Indirectly, it cautions rulers and householders to act with humility and practical judgment: governance and dharma should rely on workable knowledge rather than attempting an impossible, total mastery of every land and detail.
No specific Vāstu or ritual rule is stated; the takeaway is methodological—Puranic technical catalogues (including Vāstu lists elsewhere) may be summarized because exhaustive detail would be endless.