Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
स नाग एष नो भयं दधाति मुक्तजीवितो न दानवस्य शक्यते मया तदेकयाननम् इति प्रियाय वल्लभा वदन्ति यक्षयोषितः परे कपालपाणयः पिशाचयक्षराक्षसाः //
sa nāga eṣa no bhayaṃ dadhāti muktajīvito na dānavasya śakyate mayā tadekayānanam iti priyāya vallabhā vadanti yakṣayoṣitaḥ pare kapālapāṇayaḥ piśācayakṣarākṣasāḥ //
“This Nāga brings fear upon us; I have barely escaped with my life. I am not able to face that Dānava in single combat.” Thus the lovers spoke to their beloveds—those Yakṣa women—while nearby were skull-bearing beings: Piśācas, Yakṣas, and Rākṣasas.
This verse does not describe Pralaya; it depicts a fear-laden encounter narrative involving Nāgas, Dānavas, and other liminal beings (Piśāca/Yakṣa/Rākṣasa), reflecting the Purāṇic worldview rather than cosmological dissolution.
Indirectly, it underscores vigilance and protection from harmful influences—ideas that the Matsya Purāṇa often channels into dharmic governance (rakṣaṇa/protection) and household safeguarding through proper conduct and prescribed rites.
While no explicit Vāstu rule is stated, the mention of skull-bearing and nocturnal/liminal beings aligns with apotropaic (warding) concerns that, in Vāstu and temple practice, are addressed through protective placements, boundary rites, and consecratory rituals intended to prevent inauspicious intrusion.