Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
तदाश्मौघैर् दैत्यगणाः पुनः सिंहमरिंदमम् छादयांचक्रिरे मेघा धाराभिरिव पर्वतम् //
tadāśmaughair daityagaṇāḥ punaḥ siṃhamariṃdamam chādayāṃcakrire meghā dhārābhiriva parvatam //
Then the hosts of Daityas once again covered over that lion-like, enemy-crushing hero with torrents of stones—just as rain-clouds veil a mountain with streaming downpours.
This verse does not describe Pralaya; it depicts a battlefield image where Daityas overwhelm a hero with a barrage of stones, using a rain-cloud simile.
Indirectly, it reflects the kṣātra (royal/warrior) ideal of steadfastness under assault—an enemy-crushing protector who endures overwhelming attacks, a virtue praised in Purāṇic ethics.
No Vāstu or ritual procedure is taught here; the mountain-and-cloud imagery is poetic, used to convey total concealment and the intensity of the attack.