Matsya Purana — Questions on Padmanabha’s Lotus-Creation in the Padma Mahakalpa; Prelude to N...
यथा च तपसा दृष्ट्वा बृहस्पतिसमद्युतिः पराशरसुतः श्रीमान् गुरुर्द्वैपायनो ऽब्रवीत् //
yathā ca tapasā dṛṣṭvā bṛhaspatisamadyutiḥ parāśarasutaḥ śrīmān gururdvaipāyano 'bravīt //
And how—having beheld (the truth) through ascetic power—illustrious Dvaipāyana, the revered son of Parāśara, radiant like Bṛhaspati, spoke.
This verse does not describe Pralaya directly; it emphasizes tapas (austerity) as the means by which a great sage gains visionary knowledge, which in Purāṇic framing legitimizes teachings about cosmic cycles such as creation and dissolution.
Indirectly, it establishes Vyāsa as a trustworthy guru whose instructions—often including dharma for kings and householders—are grounded in realized insight (seen through tapas), reinforcing the ideal that rulers and householders should follow guidance from proven spiritual authorities.
No specific Vāstu or ritual procedure is stated in this line; its ritual implication is foundational—ascetic discipline and guru-authority validate later prescriptions (including temple rites or Vāstu rules) delivered by such seers.