Matsya Purana — The Pushkara Manifestation
यद्यत्कामयते किंचित् तत्तल्लोकेश्वराद् भवेत् सर्वं विहाय य इमं पठेत्पौष्करकं हरेः //
yadyatkāmayate kiṃcit tattallokeśvarād bhavet sarvaṃ vihāya ya imaṃ paṭhetpauṣkarakaṃ hareḥ //
Whatever a person may desire—even the smallest thing—comes to be granted by the Lord of the worlds, if one, renouncing everything else, recites this Pauṣkaraka hymn of Hari.
It does not discuss pralaya directly; instead, it teaches a devotional principle: the supreme Lord (Lokeśvara/Hari) is the giver of results, and recitation of His praise is presented as an effective spiritual means.
For a king or householder, it frames desire and achievement within dharma: rather than relying only on worldly strategies, one should prioritize remembrance/recitation of Hari, recognizing divine sovereignty over outcomes.
Architectural rules are not mentioned; the ritual significance is the declared phala of pāṭha (recitation) of a named hymn (Pauṣkaraka) dedicated to Hari, emphasizing śravaṇa–pāṭha as a sanctioned Purāṇic practice.