Matsya Purana — Paurava Genealogy: Bharata
तस्मादपि भरद्वाजाद् ब्राह्मणाः क्षत्रिया भुवि द्व्यामुष्यायणकौलीनाः स्मृतास्ते द्विविधेन च //
tasmādapi bharadvājād brāhmaṇāḥ kṣatriyā bhuvi dvyāmuṣyāyaṇakaulīnāḥ smṛtāste dvividhena ca //
From Bharadvāja as well, there arose on earth Brahmins and Kshatriyas—those remembered as the Dvyāmuṣyāyana families of noble lineage; and they are reckoned in two distinct divisions.
This verse does not describe Pralaya; it focuses on post-creation social and dynastic continuity by tracing lineages from Bharadvāja into recognized groups.
By classifying lineages into Brahmin and Kshatriya streams, it supports the Matsya Purana’s broader varnashrama framework—guiding kings in governance by lineage-based social roles and guiding householders in preserving family tradition (kula-dharma).
No direct Vastu or temple-ritual rule appears here; the significance is genealogical—identifying ‘kaulīna’ (noble-line) Dvyāmuṣyāyaṇa families as a twofold classification within traditional lineage records.