Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
ततः प्रज्वलितः क्रोधात् प्रदहन्निव तेजसा तस्मिन्क्रुद्धे तु दैत्येन्द्रे तमोभूतमभूज्जगत् //
tataḥ prajvalitaḥ krodhāt pradahanniva tejasā tasminkruddhe tu daityendre tamobhūtamabhūjjagat //
Then, inflamed with anger and blazing as if burning everything with his radiance—when that lord of the Daityas grew wrathful, the whole world became shrouded in darkness.
It does not describe Pralaya directly; it depicts a cosmic portent where the world is darkened (tamas) due to a Daitya lord’s furious, destructive energy, a common Puranic sign of upheaval.
By implication, it warns that uncontrolled krodha (anger) in a powerful ruler-like figure brings social and cosmic disorder; dharmic governance emphasizes self-restraint and protection rather than rage that “darkens the world.”
No direct Vastu or ritual rule is stated; however, the tejas–tamas contrast is a recurring ritual-cosmological idea (maintaining auspicious light/clarity), often used elsewhere in the Matsya Purana to frame auspiciousness versus inauspiciousness.