Matsya Purana — Cosmography of Jambūdvīpa: Varṣas
मध्ये त्विलावृतं नाम महामेरोः समन्ततः चतुर्विंशत्सहस्राणि विस्तीर्णो योजनैः समः //
madhye tvilāvṛtaṃ nāma mahāmeroḥ samantataḥ caturviṃśatsahasrāṇi vistīrṇo yojanaiḥ samaḥ //
In the middle lies the region called Ilāvṛta; encircling the great Mount Meru (Mahāmeru) on every side, it extends evenly for twenty‑four thousand yojanas in breadth.
This verse is not about Pralaya; it presents a stable cosmographic layout, locating Ilāvṛta as the central region encircling Mount Meru with a defined, uniform extent.
Indirectly, it supports dharmic governance by grounding ritual calendars, pilgrimage routes, and sacred directionality in a shared cosmic map—knowledge a king would patronize and a householder would use for rites and tīrtha-oriented duties.
The key significance is the use of standardized measurement (yojana) and central orientation around Meru—ideas echoed in Vastu and temple planning where a fixed center and proportional, symmetrical extensions are ritually meaningful.