पूर्वं कृतयुगं नाम ततस्त्रेताभिधीयते द्वापरं च कलिश्चैव युगानि परिकल्पयेत् //
pūrvaṃ kṛtayugaṃ nāma tatastretābhidhīyate dvāparaṃ ca kaliścaiva yugāni parikalpayet //
Zuerst kommt das Zeitalter namens Kṛta (Satya); danach heißt es Tretā; dann folgen Dvāpara und Kali — so soll man die Yugas als viergliedrigen Zyklus begreifen.
It does not describe Pralaya directly; it establishes the ordered framework of cosmic time (the four yugas) within which creation, preservation, and dissolution narratives are situated.
By defining the four yugas, it implies that standards of conduct and governance are understood against a changing moral climate; kings and householders are taught to uphold dharma appropriate to the age, especially amid decline toward Kali.
No specific Vāstu or ritual rule is stated; the verse provides the chronological scaffold often used to contextualize when rites, temple traditions, or dharma-standards are said to flourish or diminish across yugas.