Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
अहं तु तव पुत्रस्य तव चैव महाव्रत भृत्य इत्यवगन्तव्यः साध्यो यदिह कर्मणा //
ahaṃ tu tava putrasya tava caiva mahāvrata bhṛtya ityavagantavyaḥ sādhyo yadiha karmaṇā //
But I am to be understood as a servant—of your son and of you as well, O great-vowed one—and I shall carry out, here and now, whatever is to be accomplished by action.
This verse does not discuss pralaya or cosmology; it emphasizes dharma expressed as loyal service and prompt accomplishment of duties through action.
It reflects a Rajadharma principle: stability of rule and household order depends on faithful attendants who serve both the present authority and the rightful successor, executing necessary tasks without hesitation.
No explicit Vastu/ritual rule appears here; the takeaway is procedural—tasks should be completed effectively “by action,” a mindset applicable to ritual performance and administrative execution.