Matsya Purana — The Advent of Narasiṃha and Hiraṇyakaśipu’s Weapon-Assault
अस्त्रैः प्रज्वलितैः सिंहम् आवृणोदसुरोत्तमः विवस्वान् घर्मसमये हिमवन्तमिवांशुभिः //
astraiḥ prajvalitaiḥ siṃham āvṛṇodasurottamaḥ vivasvān gharmasamaye himavantamivāṃśubhiḥ //
With blazing missiles, that foremost of Asuras enveloped the lion—just as the Sun, in the heat of summer, covers Himavat with his rays.
This verse does not describe Pralaya; it is a combat image using a natural simile (sunlight over Himavat) to convey how completely the Asura’s blazing astras shrouded the opponent.
Indirectly, it reflects the Purāṇic ideal that martial power (astra-vidyā) can decisively dominate a battlefield; in rajadharma contexts, such imagery supports the expectation that rulers maintain disciplined military capability—though no explicit ethical injunction appears in this line.
No Vāstu or ritual procedure is stated; the verse is purely narrative and poetic, centered on astras (weapons) and a nature-based comparison.