Matsya Purana — Characteristics of Dvāpara and Kali Yugas
जातमात्रेष्वपत्येषु ततः कृतमवर्तत यथा स्वर्गे शरीराणि नरके चैव देहिनाम् //
jātamātreṣvapatyeṣu tataḥ kṛtamavartata yathā svarge śarīrāṇi narake caiva dehinām //
From the very moment offspring are born, the deed (karma) set in motion begins to bear its effect—just as embodied beings obtain bodies in heaven, and likewise in hell.
It does not describe cosmic Pralaya directly; it teaches karmic causation—deeds ripen into embodied experience, producing suitable “bodies” for heaven or hell.
By asserting that karma begins bearing fruit from birth onward, it underlines why kings and householders must uphold dharma—just governance, charity, restraint, and ritual duty shape future states of experience.
No Vastu or iconographic rule is stated; the practical ritual takeaway is that right action (and prescribed rites) are meaningful because they generate karmic results that shape one’s post-mortem condition.