Matsya Purana — Cosmography of Jambūdvīpa: Varṣas
मेरुस्तु शुशुभे दिव्यो राजवत्स तु वेष्टितः आदित्यतरुणाभासो विधूम इव पावकः //
merustu śuśubhe divyo rājavatsa tu veṣṭitaḥ ādityataruṇābhāso vidhūma iva pāvakaḥ //
The divine Mount Meru shone in splendour—encircled like a royal rampart—radiant with the fresh glow of the rising sun, like a smokeless fire.
This verse is not about Pralaya; it presents cosmographic imagery of the stable, luminous axis-mountain (Meru), emphasizing order and radiance in the structured universe.
Indirectly, the simile “like a royal rampart” evokes ideals of protection and well-ordered sovereignty—suggesting that kingship, like Meru’s enclosure, should be stable, protective, and resplendent.
While not a Vāstu rule, the verse uses architectural language (encircled like a royal fortification), supporting the Purāṇic aesthetic of concentric, enclosed sacred forms—an idea later echoed in temple and mandala planning.