Matsya Purana — Ila–Sudyumna Episode and the Expansion of the Ikṣvāku
एका षष्टिसहस्राणि सुतमेकं तथापरा गृह्णातु वंशकर्तारं प्रभागृह्णाद् बहूंस्तदा //
ekā ṣaṣṭisahasrāṇi sutamekaṃ tathāparā gṛhṇātu vaṃśakartāraṃ prabhāgṛhṇād bahūṃstadā //
One queen accepted a single son—one who would continue the dynasty—while the other, Prabhā, then accepted many sons.
This verse does not discuss Pralaya; it focuses on dynastic continuity through the acceptance of sons, highlighting lineage-making (vaṃśa-kartā) rather than cosmic dissolution.
It reflects the Purāṇic emphasis on gṛhastha-dharma and royal duty to ensure orderly succession—securing a legitimate heir who can continue the dynasty and uphold social and political stability.
No Vāstu/temple-building or ritual procedure is explicitly mentioned; the technical focus is genealogical (vaṃśa) and succession-oriented rather than architectural.