Matsya Purana — Pṛthu
किम् अर्थं च कृता संज्ञा भूमेः किं पारिभाषिकी गौर् इतीयं च विख्याता सूत कस्माद्ब्रवीहि नः //
kim arthaṃ ca kṛtā saṃjñā bhūmeḥ kiṃ pāribhāṣikī gaur itīyaṃ ca vikhyātā sūta kasmādbravīhi naḥ //
For what reason was this designation for the Earth established, and what is its technical (traditional) definition? And why is she renowned by the name ‘Gauḥ’ (“Cow”)? O Sūta, tell us the reason.
Directly, it does not describe pralaya; it frames a doctrinal inquiry into sacred nomenclature—how and why the Earth is named—often a prelude to cosmological explanations in Purāṇic discourse.
Indirectly, it supports dharma-based living by insisting on correct understanding of sacred terms and cosmological concepts; such knowledge underlies righteous governance and household ritual worldview, even though no explicit royal/householder duty is stated here.
No explicit Vāstu or temple rule is stated, but the focus on technical definition (pāribhāṣikī) aligns with how later Vāstu/ritual manuals define terms precisely before prescribing measurements, rites, or iconographic standards.