Matsya Purana — Vishnu’s Battle with the Daityas: Astra-Combat
ब्राह्ममस्त्रं चकारासौ सर्वास्त्रविनिवारणम् तेन तत्प्रशमं यातं रौद्रास्त्रं लोकघस्मरम् //
brāhmamastraṃ cakārāsau sarvāstravinivāraṇam tena tatpraśamaṃ yātaṃ raudrāstraṃ lokaghasmaram //
He then deployed the Brahma-weapon, the countermeasure that restrains all other weapons; by it, the world-devouring Raudra-weapon was brought to calm and cessation.
It highlights a pralaya-like threat—an unstoppable, world-consuming force (loka-ghasmaram)—and shows that cosmic order is preserved through a higher, restraining power that can pacify such destruction.
It implies dharmic restraint: even when powerful means exist, the righteous priority is to prevent harm to the world. A ruler’s duty is to neutralize destructive forces and protect subjects rather than escalate violence.
No Vāstu or temple-rule detail appears directly; the ritual takeaway is the Purāṇic principle of śamana (pacification) and vinivāraṇa (restraint), where higher mantric/ritual authority is used to avert catastrophic outcomes.