Matsya Purana — The Burning of Tripura and Rudra’s Victory
सो ऽपीषुः पत्त्रपुटवद् दग्ध्वा तन्नगरत्रयम् त्रिधा इव हुताशश्च सोमो नारायणस्तथा //
so 'pīṣuḥ pattrapuṭavad dagdhvā tannagaratrayam tridhā iva hutāśaśca somo nārāyaṇastathā //
He too—like a blazing fire—burned those three cities, as though dividing them into three parts; so did Soma, and likewise Nārāyaṇa.
It uses a pralaya-like image—fire consuming and dividing—showing how divine power can dissolve even fortified worlds (the three cities), echoing the Purāṇic theme that destruction is effortless for the cosmic principle.
Indirectly, it models the ideal of decisive action against adharma: just as the divine weapon removes a threat swiftly, a king must remove sources of disorder, and a householder should burn away inner vices through discipline and devotion.
The verse is not a Vāstu rule; it references the “three cities” (Tripura) as a mythic construct, often interpreted as symbolic ‘fortresses’ of ego or impurity rather than a literal town-planning prescription.