Matsya Purana — The Terror of Tripura and the Gods’ Hymn to Śiva
*सूत उवाच अशीलेषु प्रदुष्टेषु दानवेषु दुरात्मसु लोकेषूत्साद्यमानेषु तपोधनवनेषु च //
*sūta uvāca aśīleṣu praduṣṭeṣu dānaveṣu durātmasu lokeṣūtsādyamāneṣu tapodhanavaneṣu ca //
Sūta said: When the wicked Dānavas—bereft of right conduct and of evil nature—were laying waste to the worlds, and even the forest-hermitages of the ascetic sages, rich in tapas (tapodhana), were being ravaged,
It presents classic pre-pralaya conditions: adharma rising, demonic forces dominating, and the orderly life of the worlds—especially ascetic sanctuaries—being violently disrupted.
By highlighting the devastation of society and hermitages, it implies a ruler’s dharma: restraining violent, unrighteous powers and protecting sages, sacred spaces, and the moral order that sustains the realm.
While not giving Vāstu rules directly, it underscores the sanctity of tapovana-āśramas (ritual and ascetic centers). Their protection is a prerequisite for sustained yajña, tapas, and the continuity of sacred institutions.