Matsya Purana — Soma
पौर्णमास्यां स दृश्येत शुक्लः सम्पूर्णमण्डलः एवमाप्यायितः सोमः शुक्लपक्षे ऽप्यहःक्रमात् देवैः पीतसुधं सोमं पुरा पश्चात्पिबेद्रविः //
paurṇamāsyāṃ sa dṛśyeta śuklaḥ sampūrṇamaṇḍalaḥ evamāpyāyitaḥ somaḥ śuklapakṣe 'pyahaḥkramāt devaiḥ pītasudhaṃ somaṃ purā paścātpibedraviḥ //
On the full-moon night he (Soma, the Moon) is seen as bright and white, with a perfectly complete orb. Thus nourished day by day throughout the bright fortnight in the order of the days (ahaḥ-krama), Soma—whose ambrosial essence was formerly drunk by the gods—is afterwards drunk by Ravi (the Sun).
It does not describe Pralaya directly; it explains a recurring cosmic process—how Soma waxes in the bright fortnight and is then ‘drunk’ by the Sun—showing the Purana’s cyclic view of cosmic order (ṛta) rather than dissolution.
By grounding time in lunar phases (Purnima, Shukla Paksha), it supports dharmic scheduling—fasts, śrāddha, and public rites—so a king or householder aligns governance and ritual life with the sacred calendar.
Ritually, it highlights Purnima and the bright fortnight as key temporal markers for offerings and observances; architecturally it is indirect, but such calendrical cosmology underpins temple festival timing and monthly vrata cycles.