Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
तत्र वर्तस्व वंशाय वर्धयात्मानम् आत्मना त्वया धर्मो ऽर्जितस्तेन द्वितीयां कुरु वै तनुम् //
tatra vartasva vaṃśāya vardhayātmānam ātmanā tvayā dharmo 'rjitastena dvitīyāṃ kuru vai tanum //
Therefore, abide there for the sake of the lineage; strengthen yourself by your own self-discipline. Since you have earned dharma, by that merit indeed make for yourself a second embodiment (a renewed life/continuation).
It does not describe Pralaya directly; instead it emphasizes post-crisis continuity—preserving the lineage and renewing life through the power of earned dharma.
It frames lineage-preservation as a duty: remain steadfast, cultivate inner discipline, and let dharma acquired through right conduct become the force that sustains family and social order.
No Vastu or ritual procedure is specified; the verse is ethical and dynastic, focusing on dharma as the sustaining ‘power’ behind renewal and continuity.