Matsya Purana — Characteristics of Dvāpara and Kali Yugas
श्रौतस्मार्तस्थितानां तु धर्मे सप्तर्षिदर्शिते ते तु धर्मव्यवस्थार्थं तिष्ठन्तीह कृते युगे //
śrautasmārtasthitānāṃ tu dharme saptarṣidarśite te tu dharmavyavasthārthaṃ tiṣṭhantīha kṛte yuge //
But for those established in śrauta and smārta dharma—the dharma shown by the Seven Sages (Saptarṣis)—the Saptarṣis remain here in the Kṛta Yuga in order to regulate and firmly establish the order of dharma.
It does not describe pralaya directly; it emphasizes continuity after cosmic transitions by stating that the Saptarṣis remain to stabilize and administer dharma in the Kṛta Yuga.
It frames dharma as a regulated system grounded in śrauta (Vedic rites) and smārta (traditional duties). A king protects this dharma-order in society, while householders follow it through prescribed rites and ethical conduct under sage-guided norms.
Ritually, it highlights śrauta–smārta observance as the standard upheld by the Saptarṣis; it does not mention Vāstu or temple rules explicitly, but it underwrites the authority of Vedic-ritual procedure that later informs consecrations and sacred building rites.