Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
ऊचुर्ब्रह्मर्षयस्तं तु वचनं धर्मसंहितम् ऋषिवंशेषु भगवंश् छिन्नमूलमिदं पदम् //
ūcurbrahmarṣayastaṃ tu vacanaṃ dharmasaṃhitam ṛṣivaṃśeṣu bhagavaṃś chinnamūlamidaṃ padam //
The brahmarṣis said: “O Blessed One, this statement is a compendium of dharma; yet, within the lineages of sages, this teaching appears cut off from its root (its original source).”
This verse does not describe pralaya directly; it highlights concern for the authentic “root” (mūla) of a dharma-teaching as preserved in rishi lineages.
It implies that dharma should be followed with proper grounding in authoritative tradition (paramparā); rulers and householders are urged to rely on well-sourced teachings rather than isolated claims.
No specific vastu/ritual rule is stated; the takeaway is methodological—ritual or architectural prescriptions should be traced to their mūla (source) within recognized śāstric transmission.