Matsya Purana — Description of Gomedaka and Puṣkara Dvīpas; the Lokāloka Boundary; Ocean Tide...
द्वीपार्धस्य परिक्षिप्तः पश्चिमे मानसो गिरिः स्थितो वेलासमीपे तु पूर्वचन्द्र इवोदितः //
dvīpārdhasya parikṣiptaḥ paścime mānaso giriḥ sthito velāsamīpe tu pūrvacandra ivoditaḥ //
On the western side, the Mānasā mountain lies encircling half of the island-region; and near the seashore it stands forth, rising like the moon appearing in the east.
This verse is not about Pralaya; it belongs to the Matsya Purana’s cosmography, mapping mountains and coastal boundaries to describe the ordered structure of the world.
Indirectly, such geographical catalogues support a king’s dharmic governance—knowing regions, boundaries, and sacred landscapes for administration, pilgrimage routes, and protection of coastal/frontier zones—though no explicit royal duty is stated in this verse.
No direct Vastu or ritual rule is given; however, the imagery of coastal boundary (velā) and stable mountain placement reflects the Purana’s broader concern with auspicious orientation and site-sense that later informs temple-town planning in Matsya Purana Vastuvidya sections.