Matsya Purana — Solar–Lunar Motions
पार्श्वेभ्यो बाह्यतस् तावल् लोकालोकश्च पर्वतः योजनानां सहस्राणि दशोर्ध्वं चोच्छ्रितो गिरिः //
pārśvebhyo bāhyatas tāval lokālokaśca parvataḥ yojanānāṃ sahasrāṇi daśordhvaṃ cocchrito giriḥ //
On the outer sides of the cosmic regions lies the mountain called Lokāloka; that mountain rises upward to a height of ten thousand yojanas.
This verse is not describing Pralaya directly; it defines the cosmic boundary (Lokāloka) that demarcates the known, illumined worlds from the region beyond, using a precise height measurement.
Indirectly, it supports the Purāṇic ideal that rulers and householders should learn sacred cosmography (bhūgola) to align rituals, calendars, and worldview with dharma, though no specific royal duty is commanded here.
No temple-building (Vāstu) rule is stated; the ritual relevance is conceptual—Lokāloka functions as a cosmological boundary used in Purāṇic mapping of sacred space and in framing the ‘known world’ for rites and cosmological contemplation.