Matsya Purana — Measures of Time: Caturyuga Computation
जायन्ते च तदा शूरा आयुष्मन्तो महाबलाः न्यस्तदण्डा महायोगा यज्वानो ब्रह्मवादिनः //
jāyante ca tadā śūrā āyuṣmanto mahābalāḥ nyastadaṇḍā mahāyogā yajvāno brahmavādinaḥ //
And then are born heroic men—long-lived and exceedingly strong—who have laid aside violence, are great practitioners of yoga, devoted sacrificers, and proclaimers of Brahman, the Vedic truth.
This verse does not describe Pralaya directly; it describes the moral-spiritual quality of people born in a righteous phase of time—marked by strength joined with non-violence, yoga, and Vedic truth.
It presents an ideal social outcome of dharma: rulers and householders should cultivate restraint (nyasta-daṇḍa as non-cruelty), support yajña and Vedic learning, and encourage yogic discipline—creating a society where power is aligned with righteousness.
The explicit ritual element is yajña (Vedic sacrifice): the verse praises a culture of properly performed rites and Vedic proclamation; it does not state Vāstu or temple-building rules in this line.