Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
अयोगतश्चाप्यचरन् मार्गं निशि निशाचरः सग्रहः सह नक्षत्रैर् आकापतिररिंदमः //
ayogataścāpyacaran mārgaṃ niśi niśācaraḥ sagrahaḥ saha nakṣatrair ākāpatirariṃdamaḥ //
And the night-wanderer (the Moon), moving out of due order, traversed its path by night—together with the planets and the constellations—O subduer of foes.
It presents a classic pralaya-omen: the Moon, planets, and constellations move irregularly, signaling breakdown of cosmic order that often precedes dissolution or major upheaval in Puranic narratives.
By framing celestial irregularities as meaningful omens, it implies that a ruler should heed nimittas (portents), consult learned astrologers, and undertake protective rites and prudent governance when cosmic disorder is observed.
No direct Vāstu rule is stated; the ritual takeaway is nimitta-śānti—propitiatory rites performed when grahas and nakṣatras behave abnormally, a common Purāṇic response to avert calamity.