Matsya Purana — Kailasa
सरसस्तु सरस्त्वेतत् स्मृतमुत्तरमानसम् मृग्या च मृगकान्ता च तस्माद् द्वे सम्प्रसूयताम् //
sarasastu sarastvetat smṛtamuttaramānasam mṛgyā ca mṛgakāntā ca tasmād dve samprasūyatām //
This lake, born from the lake (Saras), is remembered as Uttara-Mānasa. And from it, the two—Mṛgyā and Mṛgakāntā—are said to arise.
It does not describe Pralaya directly; it records a sacred-geography origin statement—naming Uttara-Mānasa and noting that two named entities (Mṛgyā and Mṛgakāntā) arise from it.
Indirectly, it supports the Purāṇic ethic of tīrtha-yātrā and reverence for sacred places—duties often recommended for householders and rulers as acts of merit and protection of dharma.
No explicit Vāstu or temple-building rule appears here; the ritual takeaway is the identification of a specific tīrtha (Uttara-Mānasa), which would guide pilgrimage, bathing, and associated rites performed at named sacred waters.