Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
सोमस्येति चिरादाह ततो ऽगृह्णाद्विधुः सुतम् बुध इत्यकरोन्नाम्ना प्रादाद्राज्यं च भूतले //
somasyeti cirādāha tato 'gṛhṇādvidhuḥ sutam budha ityakaronnāmnā prādādrājyaṃ ca bhūtale //
After a long time, the Moon (Vidhu) said, “(He is) Soma’s,” and then accepted the son. He named him “Budha” and bestowed upon him sovereignty on the earth.
This verse does not discuss Pralaya; it focuses on genealogical continuity—how royal succession is established through recognition, naming, and the granting of earthly sovereignty.
It highlights a key royal-ethical theme in the Matsya Purana: legitimate rule arises through acknowledged lineage and formal investiture (naming and bestowal of rājya), implying that kingship should be publicly affirmed and responsibly conferred.
No explicit Vastu or temple-construction rule appears here; the closest ritual implication is the formal act of naming and investiture, which aligns with samskara-like legitimacy practices in Puranic royal culture.