Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
ततस्तु तस्यास्त्रवराभिमन्त्रितः शरो ऽर्धचन्द्रप्रतिमो महारणे पुरंदरस्यासनबन्धुतां गतो नवार्कबिम्बं वपुषा विडम्बयन् //
tatastu tasyāstravarābhimantritaḥ śaro 'rdhacandrapratimo mahāraṇe puraṃdarasyāsanabandhutāṃ gato navārkabimbaṃ vapuṣā viḍambayan //
Then, in that great battle, an arrow—consecrated with the finest weapon-mantras—shaped like a half-moon, struck Purandara (Indra) so that he fell into helpless bondage upon his seat; and by its splendor it seemed to mock the disc of the newly risen sun.
This verse does not discuss Pralaya; it depicts a martial scene where a mantra-empowered arrow overwhelms Indra, emphasizing the Purana’s heroic-battle imagery rather than cosmology.
Indirectly, it reflects the Kshatriya ethic found in Puranic narratives: mastery of astras (consecrated weapons), disciplined warfare, and the idea that even divine kings like Indra can be checked by superior merit or mantra-power.
The ritual element is the abhimantṛaṇa (mantric consecration) of a weapon—showing how mantra-vidhi is applied to action—though no Vastu or temple-building rule is stated in this particular verse.