Matsya Purana — Cosmography of Jambūdvīpa: Varṣas
*सूत उवाच शृणुध्वं यानि वर्षाणि पूर्वोक्तानि च वै मया दक्षिणेन तु नीलस्य निषधस्योत्तरेण तु //
*sūta uvāca śṛṇudhvaṃ yāni varṣāṇi pūrvoktāni ca vai mayā dakṣiṇena tu nīlasya niṣadhasyottareṇa tu //
Sūta said: “Listen to the regions (varṣas) that were previously described by me—those lying to the south of the Nīla mountain and to the north of Niṣadha.”
This verse does not discuss pralaya; it introduces a geographic classification of varṣas by mountain boundaries (Nīla and Niṣadha) within the Purāṇic cosmographic framework.
Indirectly, Purāṇic geography frames the sacred world-order in which kings rule and householders perform rites; knowing the named regions and boundaries supports pilgrimage lore, jurisdictional imagination, and dharmic orientation, though no direct duty is stated here.
No explicit Vāstu or ritual procedure is given; the ritual relevance is contextual—sacred geography underpins tīrtha (pilgrimage) mapping and the cosmological orientation often used in temple and ritual world-view.