Matsya Purana — Kailasa
शुनामुखांश्चोर्दमरून् सिन्धुरेतान्निषेवते गन्धर्वान्किन्नरान्यक्षान् रक्षोविद्याधरोरगान् //
śunāmukhāṃścordamarūn sindhuretānniṣevate gandharvānkinnarānyakṣān rakṣovidyādharoragān //
The Sindhu region is inhabited by the Śunāmukhas and the Urdamarus; there also dwell the Gandharvas, Kinnaras, Yakṣas, Rākṣasas, Vidyādharas, and the serpent-beings (Nāgas).
This verse is not about Pralaya; it belongs to a cosmographic/ethnographic listing of who inhabits particular regions (here, the Sindhu area), mixing human tribes with semi-divine classes.
Indirectly, it frames the king’s world as populated by diverse peoples and non-human classes; such catalogues support Purāṇic ideas of governance and diplomacy across frontier regions, though no explicit rājadharma rule is stated in this verse.
No Vāstu or ritual procedure is taught here; the takeaway is geographic-cosmological context—certain regions are traditionally said to be associated with Gandharvas, Yakṣas, Nāgas, and similar beings.