Matsya Purana — The Battle at Tripura: Shiva’s Strategy
भूयो भूयः स विव्याध गणेश्वरमहत्तमान् भित्त्वा भित्त्वा रुरावोच्चैर् नभस्यम्बुधरो यथा //
bhūyo bhūyaḥ sa vivyādha gaṇeśvaramahattamān bhittvā bhittvā rurāvoccair nabhasyambudharo yathā //
Again and again he pierced the mightiest lords of the Gaṇas; striking and striking, he roared aloud—like a thundercloud rumbling in the sky.
This verse does not describe pralaya; it uses a cosmic image (a thundercloud in the sky) to intensify the sound and force of a battle scene.
Indirectly, it exemplifies valor and steadfastness under conflict—qualities later mapped in Purāṇic ethics to kṣatriya duty (protecting order and confronting hostile forces).
No Vāstu or ritual procedure is stated; the verse is primarily martial and poetic, emphasizing repeated strikes and a thunder-like roar.