Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
पुरुषत्वं हृतं सर्वं स्त्रीरूपे विस्मितो नृपः इलेति साभवन्नारी पीनोन्नतघनस्तनी //
puruṣatvaṃ hṛtaṃ sarvaṃ strīrūpe vismito nṛpaḥ ileti sābhavannārī pīnonnataghanastanī //
All his manhood was taken away; the king stood astonished in a woman’s form. She became a woman named Ilā, with full, high, and well-rounded breasts.
This verse does not discuss pralaya; it narrates a miraculous bodily transformation within a mythic royal episode, emphasizing divine/ritual causality rather than cosmic dissolution.
Indirectly, it underscores that a ruler’s identity and power remain subject to higher dharma and divine ordinance; kingship is not mere bodily status but must align with moral and ritual order.
No Vāstu or temple-building rule appears in this verse; its significance is narrative and symbolic, describing a transformation that typically arises from entering a restricted sacred/ritual domain in the broader Ilā episode.