Matsya Purana — Pṛthu
आयुर् धनानि सौख्यं च पृथौ राज्यं प्रशासति न दरिद्रस्तदा कश्चिन् न रोगी न च पापकृत् //
āyur dhanāni saukhyaṃ ca pṛthau rājyaṃ praśāsati na daridrastadā kaścin na rogī na ca pāpakṛt //
When Pṛthu governed the kingdom, life-span, wealth, and happiness flourished; at that time there was no one who was poor, none who was diseased, and none who lived as a doer of sin.
This verse does not address Pralaya; it highlights the worldly results of dharmic governance—prosperity, health, and moral order—during King Pṛthu’s reign.
It presents the Rajadharma ideal: a king’s just administration should secure public welfare—removing poverty and disease and restraining sinful conduct—so that subjects naturally thrive in longevity, wealth, and happiness.
No direct Vāstu or ritual procedure is stated; indirectly, it supports the Matsya Purana’s wider idea that orderly, dharmic rule is the foundation for stable civic life in which temples, towns, and rites can be properly maintained.