Matsya Purana — Genealogy of Kaśyapa: Ādityas
उत्पद्यन्ते प्रलीयन्ते कल्पे कल्पे तथैव च दितिः पुत्रद्वयं लेभे कश्यपाद् इति नः श्रुतम् //
utpadyante pralīyante kalpe kalpe tathaiva ca ditiḥ putradvayaṃ lebhe kaśyapād iti naḥ śrutam //
They arise and they dissolve—so it is in every kalpa, again and again. And we have heard that Diti obtained two sons from Kaśyapa.
It states the core Purāṇic principle of cyclical cosmology: beings repeatedly originate and dissolve in every kalpa, emphasizing recurring creation and reabsorption rather than a single linear history.
Indirectly, it frames human life within repeating cosmic cycles, encouraging kings and householders to uphold dharma and maintain lineage and social order (through righteous progeny and governance) despite the impermanence of worldly forms.
No direct Vastu or ritual rule is stated; the verse functions as cosmological and genealogical context that later supports Purāṇic rituals (kalpa-based rites) and temple traditions grounded in cyclical time.