Matsya Purana — Tārakāsura’s Austerity and Boon; Mobilization for War; Bṛhaspati’s Fourfold P...
तस्मिन्निर्मांसतां याते तपोराशित्वमागते जज्वलुः सर्वभूतानि तेजसा तस्य सर्वतः //
tasminnirmāṃsatāṃ yāte taporāśitvamāgate jajvaluḥ sarvabhūtāni tejasā tasya sarvataḥ //
When he had become utterly fleshless and had entered a state that was nothing but concentrated austerity, all beings on every side blazed forth under the force of his radiance.
This verse does not directly describe Pralaya; it illustrates how extreme tapas condenses into tejas (spiritual heat/radiance) so powerful that it affects all beings in every direction—an energy often invoked in Puranic cosmology as capable of shaking worlds.
It underscores the Purāṇic principle that disciplined self-restraint (tapas) produces tangible power (tejas). For kings and householders, it implies that authority and prosperity should be grounded in austerity, ethical restraint, and inner discipline rather than mere force.
No direct Vāstu or temple-construction rule appears here; ritually, it supports the idea that sustained tapas empowers yajña and other rites by generating tejas, the sanctifying potency that is believed to pervade and purify the surroundings.