Matsya Purana — Śukra Warns Vṛṣaparvan: The Ripening of Adharma and Devayānī’s Demand for Śar...
नाधर्मश्चरितो राजन् सद्यः फलति गौर् इव शनैरावर्त्यमानस्तु मूलान्यपि निकृन्तति //
nādharmaścarito rājan sadyaḥ phalati gaur iva śanairāvartyamānastu mūlānyapi nikṛntati //
O King, adharma does not bear fruit at once—like a cow that yields milk only in due season; but when it steadily accumulates and returns upon a person, it cuts down even the very roots of prosperity and life.
This verse is not about cosmic pralaya; it teaches moral causality (karma-phala): adharma may appear delayed, but it inevitably returns and destroys one’s foundations.
It warns rulers (and householders) that injustice and unethical conduct may not be punished instantly, yet it accumulates and eventually ruins sovereignty, wealth, lineage, and social stability—therefore a king must govern through dharma.
No direct Vastu or ritual procedure is stated; the takeaway is ethical: temple-building, charity, and rites are undermined if supported by adharma—right conduct is the ‘root’ that sustains all religious and civic works.