Matsya Purana — Ritual Bathing
देवा यक्षास्तथा नागा गन्धर्वाप्सरसो ऽसुराः क्रूराः सर्पाः सुपर्णाश्च तरवो जम्बुकाः खगाः //
devā yakṣāstathā nāgā gandharvāpsaraso 'surāḥ krūrāḥ sarpāḥ suparṇāśca taravo jambukāḥ khagāḥ //
The gods, the Yakṣas, and likewise the Nāgas; the Gandharvas and Apsarases, and the Asuras; fierce serpents, Suparṇas (great birds), trees, jackals, and birds—(all these classes are spoken of).
This verse functions as a cosmological enumeration: it names multiple orders of beings that populate the worlds; it does not directly describe Pralaya, but supports the broader Purāṇic mapping of existence that is later subject to creation and dissolution cycles.
By recognizing many classes of beings—divine, semi-divine, animal, and even plant life—the Purāṇic worldview underlines a king’s duty of protection and a householder’s duty of non-cruelty and right conduct toward all living orders within the realm.
No direct Vāstu or ritual procedure is stated in this line; its relevance is contextual—such enumerations often frame later instructions about ritual offerings, protections, and auspicious considerations involving various beings.