Matsya Purana — Manvantaras
श्रुतिस्मृतिभ्यां विहितो धर्मो वर्णाश्रमात्मकः शिष्टाचारप्रवृद्धश्च धर्मो ऽयं साधुसंमतः //
śrutismṛtibhyāṃ vihito dharmo varṇāśramātmakaḥ śiṣṭācārapravṛddhaśca dharmo 'yaṃ sādhusaṃmataḥ //
Dharma, as enjoined by Śruti and Smṛti, is grounded in the system of varṇa and āśrama; and this dharma—strengthened by the conduct of the cultured and disciplined (śiṣṭa)—is approved by the virtuous.
This verse does not address pralaya directly; it defines how dharma is known—through Śruti, Smṛti, and the lived standards of the cultivated—rather than through cosmological events.
It sets the king’s and householder’s benchmark for right conduct: governance and daily duties should align with Śruti–Smṛti injunctions, be consistent with varṇāśrama obligations, and be guided by established śiṣṭa (exemplary) practice.
No specific Vāstu or iconographic rule is stated; however, it implies that ritual and temple/house practices should follow Śruti–Smṛti prescriptions and validated śiṣṭa traditions when technical details are in doubt.