Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
शैलास्त्रं मुमुचे जम्भो यन्त्रसंघातताडनम् व्यामप्रमाणैरुपलैस् ततो वर्षमवर्तत //
śailāstraṃ mumuce jambho yantrasaṃghātatāḍanam vyāmapramāṇairupalais tato varṣamavartata //
Then Jambha released the ‘Mountain-weapon’ (Śaila-astra), a crushing onslaught as though struck by a massed engine of war; and thereupon a rain of stones poured down, each measuring a vyāma (a fathom).
This verse does not describe pralaya; it depicts a martial episode where a combatant unleashes a rock-barrage (śailāstra), emphasizing destructive force rather than cosmic dissolution.
Indirectly, it reflects the Purāṇic ideal that rulers must understand protection and defense: the imagery of yantra-like massed striking suggests organized warfare and the need for preparedness against large-scale assaults.
Architecturally, the phrase yantra-saṃghāta evokes siege machinery and coordinated mechanical force—useful for interpreting Matsya Purana’s broader interest in yantras and measured magnitudes (vyāma-pramāṇa) as technical vocabulary, though no temple or ritual rule is stated in this verse.