Matsya Purana — The Attendant Hosts of the Sun and Moon: Monthly Gaṇas
तपन्तश्च जपन्तश्च ह्लादयन्तश्च वै प्रजाः गोपायन्ति स्म भूतानि ईहन्ते ह्यनुकम्पया //
tapantaśca japantaśca hlādayantaśca vai prajāḥ gopāyanti sma bhūtāni īhante hyanukampayā //
Practising austerities and reciting sacred prayers, and indeed bringing gladness to the people, they would protect living beings; they would strive and act, moved by compassion.
This verse is not about pralaya; it emphasizes dharmic conduct—spiritual discipline (tapas, japa) joined with compassion and the protection of beings.
It frames ideal duty as both inner practice and public welfare: a ruler (or responsible householder) should protect beings, gladden the people, and act from anukampā (compassion), not merely from power or self-interest.
No specific Vastu or temple-building rule is stated; the ritual element present is japa (mantra-recitation) and tapas as disciplines that support righteous leadership and compassionate action.