Matsya Purana — The Greatness of the Vibhūti-Dvādaśī Vow: Pushkara
इति कलुषत्रिदारणं जनानामपि पठतीह शृणोति चाथ भक्त्या / मतिमपि च ददाति देवलोके वसति स कोटिशतानि वत्सराणाम् //
iti kaluṣatridāraṇaṃ janānāmapi paṭhatīha śṛṇoti cātha bhaktyā / matimapi ca dadāti devaloke vasati sa koṭiśatāni vatsarāṇām //
Thus, whoever among people recites this here, or listens to it with devotion—this teaching that shatters the threefold impurity—receives right understanding as well, and dwells in the world of the gods for hundreds of crores of years.
It does not describe Pralaya directly; it is a phala-śruti verse promising purification and heavenly merit for devoted recitation/hearing.
It frames dharmic practice as accessible to all—by śravaṇa (listening) and pāṭha (recitation) with bhakti—supporting the householder ideal of regular sacred study and devotion that purifies conduct and grants right discernment (mati).
No Vāstu or temple-building rule is stated; the ritual takeaway is the efficacy of devotional recitation and attentive listening as a purificatory practice.