Matsya Purana — Pṛthu
पृथोरेवाभवद्यत्नात् ततः पृथुरजायत स विप्रैरभिषिक्तो ऽपि तपः कृत्वा सुदारुणम् //
pṛthorevābhavadyatnāt tataḥ pṛthurajāyata sa viprairabhiṣikto 'pi tapaḥ kṛtvā sudāruṇam //
Through Pṛthu’s own determined effort the accomplishment came to be; thereafter Pṛthu was born. And though consecrated by the Brahmins through abhiṣeka, he still undertook exceedingly severe austerity (tapas).
This verse does not discuss Pralaya; it focuses on royal lineage and the ethic that even a crowned king may pursue rigorous tapas to secure prosperity and order.
It presents Pṛthu as an ideal ruler: kingship is ritually affirmed by Brahmin abhiṣeka, yet true authority is strengthened by personal discipline and austerity undertaken for the realm’s welfare.
The ritual element is abhiṣeka (royal consecration by Brahmins); no Vāstu or temple-building rule is stated in this particular śloka.