Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
चन्द्रसूर्यांशुसंकाशैः सागराम्बुसमावृतैः विद्युत्वान्सर्वतः श्रीमान् आयतः शतयोजनम् //
candrasūryāṃśusaṃkāśaiḥ sāgarāmbusamāvṛtaiḥ vidyutvānsarvataḥ śrīmān āyataḥ śatayojanam //
Resplendent like the rays of the moon and the sun, encircled by ocean-like waters, flashing with brilliance on every side, it extends to a length of a hundred yojanas.
It does not directly describe Pralaya; instead, it uses ocean-water imagery and cosmic radiance (moon/sun-like) to convey the vast scale and luminous grandeur of a described realm/structure.
Indirectly, it supports the ideal of royal/communal patronage: grand, auspicious, well-sited works—often with protective water boundaries—are portrayed as signs of prosperity (śrī) and orderly governance.
Key motifs are (1) measurable extent in yojanas (standardized sacred scale), (2) enclosure by waters (moats, tanks, circumferential water planning), and (3) prescribed brilliance/auspicious appearance (tejas, śrī) as marks of an ideal sacred or royal construction.