Matsya Purana — Solar–Lunar Motions
भ्रमन्वै भ्रममाणानि ऋक्षाणि चरते रविः एवं चतुर्षु पार्श्वेषु दक्षिणान्तेषु सर्पति //
bhramanvai bhramamāṇāni ṛkṣāṇi carate raviḥ evaṃ caturṣu pārśveṣu dakṣiṇānteṣu sarpati //
Indeed, the Sun (Ravi) moves while the lunar mansions (ṛkṣas/nakṣatras) appear to revolve; thus he glides along the four quarters, reaching their southern extremes.
It does not describe pralaya directly; it presents an ordered cosmic motion—Ravi’s steady course relative to the nakṣatras—supporting the Purana’s theme of ṛta (cosmic order) rather than dissolution.
By emphasizing predictable solar and nakṣatra cycles, it underpins proper timing (kāla) for governance, agriculture, vows, and rites—key responsibilities for kings and householders guided by Jyotiṣa-based calendars.
Ritually, it supports choosing auspicious timings aligned with solar movement and nakṣatras (e.g., for consecrations, homa, and vrata observance). Architecturally, it indirectly relates to orientation by quarters (dik) used in Vāstu planning.