Matsya Purana — Solar–Lunar Motions
वैवस्वतो निवसति यमः संयमने पुरे प्रतीच्यां तु पुनर्मेरोर् मानसस्य तु मूर्धनि //
vaivasvato nivasati yamaḥ saṃyamane pure pratīcyāṃ tu punarmeror mānasasya tu mūrdhani //
Vaivasvata (Yama), the Lord of Justice, dwells in the city of Saṃyamana; and this abode is situated in the western quarter, upon the summit of Mount Mānasā, a peak of Meru.
It does not describe Pralaya directly; it belongs to cosmography, mapping where divine realms (like Yama’s Saṃyamana) are located within the ordered universe.
By locating Yama—the cosmic judge—it reinforces the Purāṇic idea that moral law and accountability are built into the universe, supporting dharma-based conduct for rulers and householders.
No temple-building rule is stated, but the directional placement (west) and sacred topography (Meru) reflect the Purāṇic habit of linking directionality to ritual cosmology—useful background for orientation concepts later seen in Vastu traditions.