Matsya Purana — Characteristics of Dvāpara and Kali Yugas
उपभोगसमर्थानि एवं कृतयुगादिषु एवं कृतस्य संतानः कलेश्चैव क्षयस्तथा //
upabhogasamarthāni evaṃ kṛtayugādiṣu evaṃ kṛtasya saṃtānaḥ kaleścaiva kṣayastathā //
Thus, in the Kṛta Yuga and the other ages, beings were fit for enjoyment and prosperity; but in Kali as well there is decline—so too the diminution of the offspring (lineages) of the Kṛta age.
It does not describe pralaya directly; it outlines cyclical historical decline across yugas, emphasizing Kali’s diminishing power, prosperity, and continuity of lineages.
By highlighting Kali’s inevitable decline, it implies the need for stronger adherence to dharma—kings must protect social order and householders must practice restraint and righteous conduct to counteract degeneration.
No explicit Vāstu or ritual rule is stated; the takeaway is contextual—ritual discipline and traditional standards are portrayed as weakening in Kali, motivating careful preservation of orthodox practices.