Matsya Purana — Solar–Lunar Motions
विभावर्यां सोमपुर्याम् उत्तिष्ठति विभावसुः महेन्द्रस्यामरावत्याम् उद्गच्छति दिवाकरः //
vibhāvaryāṃ somapuryām uttiṣṭhati vibhāvasuḥ mahendrasyāmarāvatyām udgacchati divākaraḥ //
In the night, in Somapurī, the Fire—Vibhāvasu—rises; and in Mahendra’s Amarāvatī, the Sun—Divākara—ascends.
This verse does not describe Pralaya directly; it presents a cosmographic mapping of time (night/day) onto divine cities, emphasizing ordered cosmic functioning rather than dissolution.
Indirectly, it supports dharmic time-discipline: recognizing proper cycles of night and day underpins correct timing for rites, governance routines, and household observances aligned with cosmic order.
Ritually, it can be read as a cue for kala (proper time): fire offerings and sunrise rites depend on night/day transitions; architecturally, it contributes to the broader Puranic habit of orienting sacred space with solar movement (east-facing sanctums and dawn rituals).