Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
तदा जम्भो ऽभवच्छैलो दशयोजनविस्तृतः मारुतप्रतिघातार्थं दानवानां भयापहः //
tadā jambho 'bhavacchailo daśayojanavistṛtaḥ mārutapratighātārthaṃ dānavānāṃ bhayāpahaḥ //
Then Jambha became a mountain, spreading across ten yojanas, in order to block the onrushing wind—dispelling the fear of the Dānavas.
This verse is not about Pralaya; it depicts a battle-like episode where a Danava (Jambha) transforms into a vast mountain to counter a wind-based threat, emphasizing protective power rather than cosmic dissolution.
Indirectly, it models the ethic of protection: a leader’s role is to remove fear and provide shelter against dangers (here symbolized by the “wind”), aligning with Purāṇic ideals of guardianship and defense.
No explicit Vāstu or ritual rule is stated; however, the imagery of a mountain acting as a windbreak parallels a practical Vāstu idea—using barriers or massing to mitigate harsh winds and protect inhabitants.