Matsya Purana — The Tale of Brahmadatta: Past-life Memory
न चान्यत्कारणं किंचिद् धास्यहेतौ शुचिस्मिते न सामन्यत् तदा देवी प्राहालीकमिदं वचः //
na cānyatkāraṇaṃ kiṃcid dhāsyahetau śucismite na sāmanyat tadā devī prāhālīkamidaṃ vacaḥ //
“There is no other cause whatsoever for this laughter, O pure-smiling one; it is not a trivial matter.” Then the Goddess spoke these words, though they were deceptive.
Indirectly, it frames a serious, non-trivial exchange within the Pralaya-era narrative: the laughter/smile has a significant cause, suggesting a consequential turning point in the unfolding account rather than casual speech.
It cautions against treating important signs and statements as “ordinary” and highlights discernment (viveka): in governance and household ethics, one must evaluate motives and truthfulness, since even authoritative speech can be ālīka (deceptive).
No direct Vastu or ritual rule is stated in this verse; its takeaway is interpretive—serious speech-acts and intentions matter, a principle that later supports careful adherence to ritual and architectural prescriptions rather than casual improvisation.