Matsya Purana — Description of Gomedaka and Puṣkara Dvīpas; the Lokāloka Boundary; Ocean Tide...
परिमण्डलसहस्राणि विस्तीर्णः सप्तविंशतिः ऊर्ध्वं स वै चतुर्विंशद्योजनानां महाबलः //
parimaṇḍalasahasrāṇi vistīrṇaḥ saptaviṃśatiḥ ūrdhvaṃ sa vai caturviṃśadyojanānāṃ mahābalaḥ //
It extends across thousands of circular measures; its breadth is twenty-seven yojanas, and upward it rises to twenty-four yojanas—mighty in its vast proportions.
This verse is not about Pralaya; it belongs to a technical Vastu/pramāṇa context, emphasizing vast spatial dimensions (breadth and height) rather than cosmic dissolution.
By prescribing large-scale, orderly proportions, it supports the king’s duty to commission properly measured public/ritual structures and the householder’s duty to follow śāstric standards in sacred construction and patronage.
It gives canonical proportions in yojanas—breadth (27) and height (24)—indicating a standardized, scripture-backed scale used to define the grandeur and correctness of a major sacred or cosmographic structure.