Matsya Purana — The Legend of Acchodā: Pitṛloka
इदम् ऊचुर् महाभागाः प्रसादशुभया गिरा दिवि दिव्यशरीरेण यत् किंचित् क्रियते बुधैः //
idam ūcur mahābhāgāḥ prasādaśubhayā girā divi divyaśarīreṇa yat kiṃcit kriyate budhaiḥ //
Thus spoke those noble ones, with gracious and auspicious words: “In heaven, whatever is done by the wise is accomplished through a divine body.”
It does not directly describe Pralaya; it highlights a cosmological principle about Devaloka—actions of the wise are effected through a “divine body,” implying refined existence and karmic fruition in heavenly realms.
It underscores the power of prasāda-śubha vāk (gracious, auspicious speech). For kings and householders, right speech is a dharmic discipline that supports righteous action and favorable outcomes.
No direct Vāstu or temple-building rule appears here; the ritual takeaway is the emphasis on auspicious, grace-filled speech—an important quality in mantra-recitation, blessings, and formal rites.