Matsya Purana — Characteristics of Dvāpara and Kali Yugas
वेदशास्त्रप्रणयनं धर्माणां संकरस्तथा वर्णाश्रमपरिध्वंसः कामद्वेषौ तथैव च //
vedaśāstrapraṇayanaṃ dharmāṇāṃ saṃkarastathā varṇāśramaparidhvaṃsaḥ kāmadveṣau tathaiva ca //
There will be the fabrication of new Vedic and legal treatises; a confusion and intermixture of dharmic norms; the destruction of the system of social and spiritual orders (varṇa and āśrama); and likewise the rise of desire (kāma) and hatred (dveṣa).
This verse does not describe physical pralaya; it describes moral and social dissolution—dharma-saṃkara, the collapse of varṇāśrama discipline, and the dominance of kāma (craving) and dveṣa (hatred).
It implies that rulers and householders must preserve authentic śāstra-based conduct, prevent dharma-saṃkara (norm-confusion), protect varṇāśrama duties through fair governance and education, and restrain passions like desire and hatred that destabilize society.
No direct Vāstu or temple rule is stated; ritually, it warns that when people invent or distort ‘Vedic-śāstra’ norms, correct rites and dharmic procedures become corrupted—so tradition and qualified transmission are essential.