Matsya Purana — Intermediate Dissolution
जरायुर्मेरुमुख्याश् च शैलास् तस्याभवंस् तदा / यद् औल्बं तद् अभून् मेघस् तडित्सङ्घातमण्डलम् //
jarāyurmerumukhyāś ca śailās tasyābhavaṃs tadā / yad aulbaṃ tad abhūn meghas taḍitsaṅghātamaṇḍalam //
Then its placenta became the mountains, with Meru as the foremost among them; and what had been its caul (the embryonic covering) turned into the cloud-mass, a circle of gathered lightning.
It presents a creation-style mapping of cosmic features onto a primordial ‘embryonic’ body: mountains arise from the jarāyu (placenta), while clouds and lightning form from the aulba (caul), emphasizing organic, bodily imagery for world-formation rather than a literal anatomical claim.
Indirectly, it frames nature (mountains, clouds, lightning) as ordered parts of a single cosmic process; in the Matsya Purana’s ethical worldview, this supports dharmic living—rule and household management should align with cosmic order (ṛta/dharma), respecting the stability of mountains and the seasonal power of clouds.
Though not a Vāstu rule, it foregrounds Meru and mountains as archetypal ‘axis’ and stability symbols; later Vāstu and temple-planning sections often echo this idea by treating the temple as a microcosmic mountain (Meru-like), oriented and stabilized to mirror cosmic structure.