Matsya Purana — The Battle at Tripura: Shiva’s Strategy
यदा तु पुष्ययोगेण एकत्वं स्थास्यते पुरम् तदेतन्निर्दहिष्यामि शरेणैकेन वासव //
yadā tu puṣyayogeṇa ekatvaṃ sthāsyate puram tadetannirdahiṣyāmi śareṇaikena vāsava //
But when, through the Puṣya-yoga, the city comes to stand in a single aligned unity, then, O Vāsava (Indra), I shall burn it down with a single arrow.
It does not describe cosmic Pralaya; it speaks of a targeted destruction—burning a city—triggered by a specific astrological condition (Puṣya-yoga), reflecting localized ruin rather than universal dissolution.
It implies that rulers must heed auspicious/inauspicious timings and omens affecting civic security; in the Matsya Purana’s applied dharma, governance includes protecting settlements through correct timing, vigilance, and countermeasures against hostile acts.
The verse links a city’s “ekatva” (unified alignment/coming into a single configuration) with Puṣya-yoga—suggesting that Vastu-related alignment and Jyotiṣa timing were considered ritually potent, requiring protective rites to prevent calamity.