Matsya Purana — The Battle for Tripura: Portents
प्रमथाश्च महाशूरा दानवाश्च महाबलाः युयुधुर्निश्चला भूत्वा वज्रा इव महाचलैः //
pramathāśca mahāśūrā dānavāśca mahābalāḥ yuyudhurniścalā bhūtvā vajrā iva mahācalaiḥ //
The Pramathas—great heroes—and the Dānavas—mighty in strength—fought on, standing firm and unshaken, like the vajra striking against great mountains.
It does not describe Pralaya directly; instead, it uses cosmic-scale imagery (vajra and mountains) to portray unwavering combatants, reinforcing the Purana’s theme of maintaining order through decisive conflict.
By praising steadiness and resolve under pressure, the verse implicitly supports the dharmic ideal of firmness (dhṛti) in one’s duty—whether a king in protection and war, or a householder in disciplined perseverance.
No Vastu or ritual rule is stated; the only technical element is poetic comparison—‘vajra’ and ‘mountains’—used to communicate immovability and strength rather than temple-building guidance.