Matsya Purana — Saubhagya-Śayana Vow: Lalitā/Gaurī–Śiva Worship
यस्तु द्वादश वर्षाणि सौभाग्यशयनव्रतम् करोति सप्त चाष्टौ वा श्रीकण्ठभवने ऽमरैः पूज्यमानो वसेत्सम्यग् यावत्कल्पायुतत्रयम् //
yastu dvādaśa varṣāṇi saubhāgyaśayanavratam karoti sapta cāṣṭau vā śrīkaṇṭhabhavane 'maraiḥ pūjyamāno vasetsamyag yāvatkalpāyutatrayam //
Whoever performs the Saubhāgya-Śayana vow for twelve years—whether for seven or for eight (years)—will dwell rightly in the abode of Śrīkaṇṭha (Śiva), honored by the immortals (the gods), for three myriads of kalpas.
It does not discuss pralaya directly; it uses the cosmic measure “kalpa” to express the immense duration of merit and residence in a divine realm.
It presents a vrata accessible to disciplined householders: sustained observance (7, 8, or 12 years) is framed as a dharmic path yielding spiritual reward and divine honor.
Ritually, it emphasizes vrata performance and its phala (result); architecturally, it only alludes to “Śrīkaṇṭha’s abode,” i.e., a divine/Śaiva realm rather than temple-construction rules.