Matsya Purana — Characteristics of Dvāpara and Kali Yugas
वनानां प्रथमं वृष्ट्या तेषां मूलेषु सम्भवः एवं युगाद्युगानां वै संतानस्तु परस्परम् //
vanānāṃ prathamaṃ vṛṣṭyā teṣāṃ mūleṣu sambhavaḥ evaṃ yugādyugānāṃ vai saṃtānastu parasparam //
By the first rainfall, forests arise first—sprouting from their very roots. In the same way, from one age to the next, the succession of the yugas proceeds in mutual continuity.
It emphasizes cyclical regeneration: just as rain revives growth from roots, cosmic time renews itself as yugas arise one after another in an unbroken sequence.
By highlighting continuity and orderly succession, it supports the ethical idea that kings and householders should preserve stability (dharma) across generations—maintaining institutions so society flows from one “age” to the next without rupture.
No direct Vāstu or ritual rule is stated; the takeaway is conceptual—ritual and temple traditions are to be preserved as continuous lineages (paramparā), mirroring the yuga-to-yuga continuity described.