Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
इला रूपसमाक्षिप्तमनसा वरवर्णिनी बुधस्तदाप्तये यत्नम् अकरोत्कामपीडितः //
ilā rūpasamākṣiptamanasā varavarṇinī budhastadāptaye yatnam akarotkāmapīḍitaḥ //
Budha—his mind seized by the beauty of fair-complexioned Ilā—strove to win her, tormented by desire.
This verse does not address pralaya; it belongs to a dynastic episode, focusing on Budha’s attraction to Ilā and the personal causes that lead into genealogical succession.
Indirectly, it frames desire (kāma) as a powerful motive shaping relationships and lineage; in the Purāṇic ethical lens, such impulses are to be governed by dharma so that family and royal succession proceed in an orderly, righteous way.
No Vāstu, temple-building, or ritual procedure is mentioned; the verse is narrative and genealogical rather than architectural.