Matsya Purana — Agastya’s Origin
तावूचतुस्ततः शक्रम् उभौ शम्बरसूदनम् अधर्म एष देवेन्द्र सागरस्य विनाशनम् //
tāvūcatustataḥ śakram ubhau śambarasūdanam adharma eṣa devendra sāgarasya vināśanam //
Then both of them spoke to Śakra (Indra), the slayer of Śambara: “O lord of the gods, this is adharma—an act that brings about the destruction of the ocean.”
It frames large-scale natural ruin—here, the “destruction of the ocean”—as a consequence of adharma, implying that cosmic stability (and by extension dissolution motifs) is tied to moral-cosmic order.
It reinforces the Purāṇic ethic that leaders and householders must avoid adharma because wrongdoing is not merely personal—it can destabilize the wider world (society and nature), making righteous restraint and protection of resources a duty.
No direct Vāstu or ritual procedure is stated; the takeaway is principle-level: actions contrary to dharma are portrayed as capable of damaging sacred/natural domains like the ocean, which later Vāstu/ritual sections often treat as requiring purity and protection.