Matsya Purana — Characteristics of Dvāpara and Kali Yugas
युगे युगे तदा काले प्रजा जायन्ति ताः शृणु यथाकल्पं युगैः सार्धं भवन्ते तुल्यलक्षणाः इत्येतल्लक्षणं प्रोक्तं युगानां वै यथाक्रमम् //
yuge yuge tadā kāle prajā jāyanti tāḥ śṛṇu yathākalpaṃ yugaiḥ sārdhaṃ bhavante tulyalakṣaṇāḥ ityetallakṣaṇaṃ proktaṃ yugānāṃ vai yathākramam //
In each and every Yuga, at the proper time, living beings are born—listen to this. In accordance with the Kalpa, and with the succession of Yugas, they arise bearing characteristics appropriate to each Yuga. Thus, in due order, the defining marks of the Yugas have been declared.
It emphasizes cyclical manifestation: beings arise again and again in each Yuga according to the Kalpa’s fixed order, implying a regulated cosmic rhythm of creation across time-cycles (and, by extension, periodic dissolution and re-creation).
By stating that beings carry yuga-appropriate traits, it implies that dharma and governance must be applied with awareness of the age’s conditions—kings and householders should uphold duty in ways suited to the prevailing yuga while preserving the core principles of righteousness.
No direct Vāstu or ritual rule is given; the relevance is indirect—ritual practice and social order are understood to vary in emphasis across yugas, aligning observances with the broader kalpa–yuga framework described in the Purana.