Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
ततो ऽश्मवर्षे विहते जलवर्षमनन्तरम् धाराभिरक्षमात्राभिः प्रादुरासीत्समन्ततः //
tato 'śmavarṣe vihate jalavarṣamanantaram dhārābhirakṣamātrābhiḥ prādurāsītsamantataḥ //
Then, when the shower of stones had subsided, immediately afterward a rain of water appeared on every side, falling in streams as thick as an axle.
It depicts escalating pralaya-portents: after a destructive stone-shower, an immediate, all-encompassing deluge begins with torrents described as axle-thick, signaling the onset of overwhelming dissolution conditions.
Indirectly, it frames the ethical urgency behind dharma: when cosmic disorder manifests as uncontrollable calamity, rulers and householders are reminded to uphold preparedness, restraint, and adherence to righteous counsel (as in the Manu–Matsya guidance) rather than pride in human control.
No direct Vastu or ritual rule is stated; however, the verse’s imagery of axle-thick torrents is often used in Purana-style discourse to emphasize that even strong structures are vulnerable in pralaya, underscoring why Vastu and rites are ultimately subordinate to cosmic time.