Matsya Purana — Solar–Lunar Motions
पृथिव्या विस्तरं कृत्यं योजनैस्तं निबोधत तिस्रः कोट्यस्तु विस्तारात् संख्यातास्तु चतुर्दिशम् //
pṛthivyā vistaraṃ kṛtyaṃ yojanaistaṃ nibodhata tisraḥ koṭyastu vistārāt saṃkhyātāstu caturdiśam //
Now understand the earth’s extent as measured in yojanas: its expanse is reckoned as three koṭis, distributed in count toward the four directions.
This verse is not describing Pralaya; it belongs to cosmographic enumeration, giving a traditional Puranic measure of the earth’s extent in yojanas and framing it across the four directions.
Indirectly, it supports the Purana’s broader emphasis on ordered space and correct reckoning—useful for a king’s governance (mapping realms, boundaries, pilgrimage routes) and for householders who align ritual life with directional and spatial principles.
The explicit cue is “caturdiśam” (four directions): Vastu and ritual layouts depend on cardinal orientation and proportional measurement; this verse provides the cosmological backdrop that sacred architecture mirrors through measured, directionally aligned planning.