Matsya Purana — The Battle for Tripura: Portents
कलत्रपुत्रक्षयप्राणनाशे तस्मिन्पुरे युद्धमतिप्रवृत्ते महासुराः सागरतुल्यवेगा गणेश्वराः कोपवृताः प्रतीयुः //
kalatraputrakṣayaprāṇanāśe tasminpure yuddhamatipravṛtte mahāsurāḥ sāgaratulyavegā gaṇeśvarāḥ kopavṛtāḥ pratīyuḥ //
When, in that city, the battle had become fiercely engaged—bringing destruction of wives and sons and the loss of life—the great asuras, swift as the ocean’s surge, the lords of their troops, enveloped in wrath, advanced.
It does not describe cosmic pralaya; it depicts a localized “dissolution” through war—death and the ruin of families within a city—used as a narrative marker of extreme conflict.
By stressing the ruin of households (wives, sons) and loss of life, it implicitly frames war as socially catastrophic—an ethical reminder that a king’s duty is to prevent reckless conflict and protect subjects, and that householders suffer most when dharma and restraint collapse.
No direct Vāstu or ritual rule is stated; the reference to “that city” functions as a battlefield setting rather than a prescription for town planning or temple construction.