Matsya Purana — Pṛthu
लोके ऽप्यधर्मकृज्जातः परभार्यापहारकः धर्माचारस्य सिद्ध्यर्थं जगतो ऽथ महर्षिभिः //
loke 'pyadharmakṛjjātaḥ parabhāryāpahārakaḥ dharmācārasya siddhyarthaṃ jagato 'tha maharṣibhiḥ //
Even in the world there arises one who commits unrighteousness—one who abducts another man’s wife; therefore, for the effective establishment of right conduct (dharma-ācāra) in the world, the great sages (maharṣis) set it forth.
This verse does not discuss pralaya; it focuses on why sages articulate dharma-ācāra—because adharma (such as abducting another’s wife) arises in society.
It implies that rulers and householders must uphold and enforce dharma-ācāra—protecting marriage, restraining sexual misconduct, and preventing social harm caused by crimes like parabhāryāpahāra.
No vastu/temple-architecture or ritual procedure is mentioned; the takeaway is ethical: dharma-ācāra is promulgated to curb adharma and stabilize society.