Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
ततो ऽश्मवर्षं दैत्येन्द्रा व्यमृजन्त नभोगताः नगमात्रैः शिलाखण्डैर् गिरिशृङ्गैर्महाप्रभैः //
tato 'śmavarṣaṃ daityendrā vyamṛjanta nabhogatāḥ nagamātraiḥ śilākhaṇḍair giriśṛṅgairmahāprabhaiḥ //
Then the lords of the Daityas, moving through the sky, unleashed a rain of stones—hurling mountain-sized boulders and brilliantly massive peaks and crags.
This verse does not describe Pralaya directly; it depicts a wartime escalation where Daitya chiefs create an “aśmavarṣa” (stone-rain), a common Purāṇic motif for overwhelming destruction during cosmic battles.
Indirectly, it highlights the chaos of adharma-driven aggression; in the Matsya Purana’s ethical frame, rulers are urged to restrain violence, protect subjects, and uphold order rather than emulate destructive, indiscriminate force.
No Vāstu or ritual procedure is taught here; the technical term is “aśmavarṣa” (stone-shower), used as battle imagery rather than a construction or temple-planning instruction.