Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
आच्छादयत यत्नेन वर्षास्विव घनैर्नभः दैत्यो ऽपि बाणजालं तद् व्यधमत्सायकैः शितैः //
ācchādayata yatnena varṣāsviva ghanairnabhaḥ daityo 'pi bāṇajālaṃ tad vyadhamatsāyakaiḥ śitaiḥ //
With great effort he covered the sky, as if in the rainy season with dense clouds; yet the Daitya, with his sharp missiles, shattered that very net of arrows.
It does not describe Pralaya directly; it uses a rain-cloud simile (dense clouds covering the sky) to intensify a battlefield image of arrows filling the heavens.
Indirectly, it reflects the kṣātra ideal of perseverance and martial competence: even overwhelming force (an arrow-storm) must be met with skill and resolve—qualities praised in Purāṇic royal ethics.
No Vāstu or ritual procedure is stated here; the verse is a poetic combat description centered on archery and battlefield simile.