Matsya Purana — The Battle at Tripura: Shiva’s Strategy
स नन्दी दानवेन्द्रेण परिघेण दृढाहतः भ्रमते मधुना व्यक्तः पुरा नारायणो यथा //
sa nandī dānavendreṇa parigheṇa dṛḍhāhataḥ bhramate madhunā vyaktaḥ purā nārāyaṇo yathā //
Then Nandī, struck hard by the lord of the Dānavas with an iron club (parigha), reeled about—just as Nārāyaṇa once did when, in battle with Madhu, he was plainly shaken.
This verse does not discuss pralaya; it is a battle-description, emphasizing heroic endurance through a comparison to Nārāyaṇa’s earlier struggle with the asura Madhu.
Indirectly, it models kṣānti (steadfastness) and dhairya (courage under attack): even the greatest can be shaken, yet the ideal is to regain composure and continue one’s duty—an ethic often extended in Purāṇas to kings facing adversity.
No Vāstu or ritual procedure is stated; the main technical note is the weapon term parigha (iron club), useful for iconography and Purāṇic martial vocabulary when cataloging depictions of combat scenes.