Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
ते दानवशरा घोरा दानवेन्द्रसमीरिताः विलयं जग्मुराकाशे खद्योता इव पर्वते //
te dānavaśarā ghorā dānavendrasamīritāḥ vilayaṃ jagmurākāśe khadyotā iva parvate //
Those dreadful arrows of the Dānavas, discharged at the command of the lord of the Dānavas, vanished into the sky—like fireflies disappearing against a mountain.
It uses a dissolution-style metaphor—fearsome forces (the Dānava arrows) lose efficacy and ‘dissolve’ into the sky, suggesting that adharma-driven power becomes insubstantial when cosmic order reasserts itself.
Indirectly, it reinforces a key Purāṇic ethic: power rooted in aggression and adharma is unstable. A king’s duty is to uphold dharma rather than rely on fearsome force; a householder likewise should prioritize righteous conduct over coercion.
No direct Vāstu or ritual procedure is stated; the verse is primarily poetic narrative. Its takeaway is symbolic—like fireflies against a mountain, hostile forces can appear bright briefly yet prove negligible before a greater, steady order.