Matsya Purana — Dynastic Genealogies: Paurava–Anu Lines
आसीद्बृहद्रथाच्चैव विश्वजिज्जनमेजयः दायादस्तस्य चाङ्गो वै तस्मात्कर्णो ऽभवन्नृपः //
āsīdbṛhadrathāccaiva viśvajijjanamejayaḥ dāyādastasya cāṅgo vai tasmātkarṇo 'bhavannṛpaḥ //
From Bṛhadratha was born Viśvajit Janamejaya. His heir was indeed Aṅga, and from him King Karṇa came to be.
Nothing directly—this verse is part of a dynastic catalogue, focusing on royal succession rather than cosmology or Pralaya.
Indirectly, it emphasizes legitimate succession (dāyāda), a key concern of Rajadharma: stable inheritance supports continuity of governance and social order.
None is stated; the verse is genealogical and does not discuss Vastu, temple rules, or ritual procedure.