Matsya Purana — Characteristics of Dvāpara and Kali Yugas
द्वापरेष्वभिवर्तन्ते मतिभेदास्तथा नृणाम् मनसा कर्मणा वाचा कृच्छ्राद्वार्त्ता प्रसिध्यति //
dvāpareṣvabhivartante matibhedāstathā nṛṇām manasā karmaṇā vācā kṛcchrādvārttā prasidhyati //
In the Dvāpara age, divisions of opinion and outlook arise among people. Even livelihood and worldly dealings succeed only with difficulty—whether by thought, by action, or by speech.
This verse does not describe Pralaya directly; it describes the moral-social climate of Dvāpara Yuga—marked by disagreement and difficulty in sustaining ordinary life and social order.
It implies that in Dvāpara, people become divided in judgment, so a king must govern with clearer dharmic standards and mediation, while householders must practice disciplined mind, truthful speech, and steady work to keep livelihood and relationships functioning amid growing discord.
No direct Vāstu or ritual rule is stated; the takeaway is contextual—when society is fragmented, ritual and temple/household order depend more on careful intention (manas), correct performance (karma), and proper recitation/communication (vāc).