Matsya Purana — Tripura’s Prosperity
एष ईदृशकः स्वप्नो दृष्टो वै दितिनन्दनाः दृष्टः कथं हि कष्टाय असुराणां भविष्यति //
eṣa īdṛśakaḥ svapno dṛṣṭo vai ditinandanāḥ dṛṣṭaḥ kathaṃ hi kaṣṭāya asurāṇāṃ bhaviṣyati //
O sons of Diti, such a dream has indeed been seen. Having been seen, how could it not become a cause of calamity for the Asuras?
This verse does not describe Pralaya; it uses a dream as an omen (nimitta) indicating impending misfortune for the Asuras within a conflict narrative.
It reflects the broader dharmic idea of heeding warning signs and exercising prudent judgment—leaders should assess omens, morale, and risks before undertaking actions that may lead to collective ruin.
No Vastu or temple-ritual rule appears here; the focus is on svapna (dream) as a portent, a common Puranic device for signaling approaching calamity.