Matsya Purana — Solar–Lunar Motions
प्रणाशं गच्छते यत्र तेषामस्तः स उच्यते सर्वेषामुत्तरे मेरुर् लोकालोकस्य दक्षिणे //
praṇāśaṃ gacchate yatra teṣāmastaḥ sa ucyate sarveṣāmuttare merur lokālokasya dakṣiṇe //
That region where the luminaries go to disappearance is called their ‘setting’. Mount Meru lies to the north of all the lands, and to the south of the Lokāloka mountain.
It does not describe Pralaya directly; it explains cosmic order—how luminaries ‘disappear’ at setting (asta) and where Meru and Lokāloka stand as fixed boundaries in Puranic cosmography.
Indirectly, it supports dharmic orientation: rulers and householders are encouraged to align rituals, calendrical observances, and directional practices with the cosmic geography (north–south markers like Meru and Lokāloka).
Directional doctrine: temples, altars, and ritual layouts often privilege the north and cosmic axis symbolism; Meru functions as an archetype for the world-axis, while Lokāloka marks the outer limit—useful for interpreting Vastu orientation and sacred mapping.