Matsya Purana — Cosmography of Śākadvīpa and Successive Dvīpas: Mountains
प्रथमः सूर्यसंकाशः कुमुदो नाम पर्वतः विद्रुमोच्चय इत्युक्तः स एव च महीधरः //
prathamaḥ sūryasaṃkāśaḥ kumudo nāma parvataḥ vidrumoccaya ityuktaḥ sa eva ca mahīdharaḥ //
The first is the mountain named Kumuda, radiant like the sun; it is also spoken of as Vidrumoccaya (“the Coral-Peak”), and it is indeed a mighty mountain-supporter of the earth.
It does not describe Pralaya directly; it belongs to cosmography, listing and characterizing a major mountain as an ‘earth-holder’ (mahīdhara), a stabilizing feature of the world’s structure.
Indirectly, it supports the Purāṇic aim of knowing the world’s sacred layout; such knowledge underpins pilgrimage, land sanctification, and righteous governance tied to maintaining order in one’s realm.
No explicit Vāstu rule is given, but the imagery of a radiant, stable ‘mahīdhara’ aligns with the ritual-architectural ideal of firmness and auspicious brilliance when selecting sacred sites and orienting consecrated spaces.