Matsya Purana — Cosmography of Jambūdvīpa: Varṣas
वर्षाणि यानि सप्तात्र तेषां वै वर्षपर्वताः द्वे द्वे सहस्रे विस्तीर्णा योजनैर्दक्षिणोत्तरम् //
varṣāṇi yāni saptātra teṣāṃ vai varṣaparvatāḥ dve dve sahasre vistīrṇā yojanairdakṣiṇottaram //
Here, the regions (varṣas) are said to be seven; and the mountains that bound those varṣas extend two thousand yojanas in breadth, stretching from south to north.
This verse does not describe Pralaya; it gives cosmographic structure—seven varṣas and the measured breadth/orientation of their boundary mountains—showing the ordered layout of the world as presented in the Purana.
Indirectly, it supports the Purāṇic ideal that rulers and householders should understand sacred geography and traditional measures used in pilgrimage, land description, and ritual mapping, though no explicit royal duty is stated here.
The ritual/technical significance lies in standardized measurement language (yojana) and directional orientation (south–north), concepts that also underpin Vastu-based planning, even though this verse itself is about world geography rather than temple architecture.