Matsya Purana — Cosmography of Jambūdvīpa: Varṣas
महाभूमिप्रमाणं च लोकालोकस्तथैव च पर्याप्तिं परिमाणं च गतिश्चन्द्रार्कयोस्तथा //
mahābhūmipramāṇaṃ ca lokālokastathaiva ca paryāptiṃ parimāṇaṃ ca gatiścandrārkayostathā //
“(I shall describe) the vast measure of the Earth, and likewise the Lokāloka (mountain boundary); its extent and dimensions, and also the courses (motions) of the Moon and the Sun.”
This verse does not narrate Pralaya directly; it introduces a cosmographical-astronomical exposition—measures of the Earth and the Lokāloka boundary, and the regular motions of the Sun and Moon—topics often used in Purāṇas to frame cosmic order rather than dissolution.
Indirectly: by establishing cosmic order (measures, boundaries, celestial motions), the text supports dhārmic governance and calendrical timing—kings and householders rely on solar-lunar motions for festivals, rites, taxation seasons, and auspicious scheduling.
Ritually, the Sun–Moon ‘gati’ underpins tithi, nakṣatra, and timing of yajñas and vratas; architecturally, such cosmological directions and celestial regularity inform temple orientation and ritual space symbolism (though no specific Vāstu rule is stated in this verse).