Matsya Purana — Kārtavīrya Arjuna’s Solar Boon and the Genealogy from Kroṣṭu to the Yādava Lines
*राजोवाच यस्ते जनिष्यते पुत्रस् तस्य भार्या भविष्यति तस्मात्सा तपसोग्रेण कन्यायाः सम्प्रसूयत //
*rājovāca yaste janiṣyate putras tasya bhāryā bhaviṣyati tasmātsā tapasogreṇa kanyāyāḥ samprasūyata //
The king said: “The son who will be born to you—she will become his wife. Therefore, through the intensity of her austerities, let that maiden be duly brought forth (as a daughter).”
This verse is not about Pralaya; it belongs to a dynastic/royal narrative where birth, lineage, and foretold marital alliance are emphasized.
It reflects a king’s concern for orderly succession and socially sanctioned lineage-building—linking progeny, rightful marriage, and the role of austerity (tapas) as a means to secure auspicious outcomes.
No Vāstu or temple-building rule is stated here; the only ritual-spiritual element is the stress on tapas (austerity) as a powerful means to bring about a destined birth.