Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
गत्वाथ मोहयामास रजिपुत्रान्बृहस्पतिः जिनधर्मं समास्थाय वेदबाह्यं स वेदवित् //
gatvātha mohayāmāsa rajiputrānbṛhaspatiḥ jinadharmaṃ samāsthāya vedabāhyaṃ sa vedavit //
Then Bṛhaspati went and bewildered the sons of Raji; though a knower of the Veda, he adopted a ‘Jina’ doctrine—one that stands outside the Vedic fold.
This verse does not discuss pralaya; it focuses on a dharma-conflict narrative where Bṛhaspati leads a royal group into a non-Vedic doctrine.
It implies that rulers and communities can be ‘mohita’ (misled) by persuasive teachings; a king’s duty in the Purāṇic ethic is to uphold śrauta–smārta (Veda-aligned) dharma and guard society from doctrines portrayed as vedabāhya.
No Vāstu/temple-building rule is stated here; the ritual takeaway is the text’s emphasis on maintaining Veda-based religious authority versus practices labeled non-Vedic.