Matsya Purana — Mahāgaurī’s Entry
नास्त्यत्रावसरो देवा देव्या सह वृषाकपिः निभृतः क्रीडतीत्युक्ता ययुस्ते च यथागतम् //
nāstyatrāvasaro devā devyā saha vṛṣākapiḥ nibhṛtaḥ krīḍatītyuktā yayuste ca yathāgatam //
“There is no occasion (to intrude) here, O gods—Vṛṣākapi is privately sporting with the Goddess.” Thus addressed, those gods departed, returning just as they had come.
Nothing directly about pralaya is stated here; the verse instead emphasizes divine decorum—recognizing an improper moment to approach Śiva and the Goddess.
It models maryādā (proper boundaries): even powerful beings should not intrude where privacy and propriety apply—an ethical cue for rulers and householders regarding restraint and respect.
No explicit Vāstu or ritual procedure is taught; the takeaway is ceremonial etiquette—knowing when not to enter or interrupt a sacred/private divine setting.