Matsya Purana — Narasimha’s Victory over Hiraṇyakaśipu and the Catalogue of Apocalyptic Omens
विद्युतां यत्र संपाता निपात्यन्ते नगोत्तमे ऋषभः पर्वतश्चैव श्रीमान्वृषभसंज्ञितः //
vidyutāṃ yatra saṃpātā nipātyante nagottame ṛṣabhaḥ parvataścaiva śrīmānvṛṣabhasaṃjñitaḥ //
On that foremost of mountains, where the flashes of lightning are seen to strike and fall, there is also the splendid mountain Ṛṣabha, renowned by the name Vṛṣabha.
This verse does not describe Pralaya; it is a sacred-geography note highlighting a mountain locale marked by frequent lightning strikes, a natural marvel used to characterize holy terrain.
Indirectly, it supports the Purāṇic ideal that rulers and householders gain merit by honoring and visiting renowned sacred regions (tīrthas, mountains), preserving their sanctity, and supporting pilgrims.
No explicit Vāstu or temple rule is stated; the practical takeaway is that sacred-site descriptions often include natural markers (like lightning-prone peaks) that help identify and venerate specific pilgrimage landscapes.