Matsya Purana — Description of Gomedaka and Puṣkara Dvīpas; the Lokāloka Boundary; Ocean Tide...
सुखमायुश्च रूपं च त्रिषु द्वीपेषु सर्वशः अधमोत्तमौ न तेष्वास्तां तुल्यास्ते वीर्यरूपतः //
sukhamāyuśca rūpaṃ ca triṣu dvīpeṣu sarvaśaḥ adhamottamau na teṣvāstāṃ tulyāste vīryarūpataḥ //
In those three islands, happiness, lifespan, and beauty are found everywhere. Among them there is no distinction of lowest and highest; they are all alike in vigor and in form.
This verse is not about Pralaya; it belongs to cosmographic description, stating that in certain Dvipas life is uniformly happy, long-lived, and beautiful without extremes of superiority or inferiority.
Indirectly, it presents an ideal social condition—no “lowest” or “highest”—which a king aims to approximate through just governance and dharmic order so that prosperity, health, and well-being become widespread.
No direct Vastu or ritual rule is stated; the verse functions as a descriptive benchmark of an ideal realm, often used in Purana literature to contrast with human society and motivate dharmic living.