Matsya Purana — Saubhagya-Śayana Vow: Lalitā/Gaurī–Śiva Worship
शृणुयादपि यश्चैव प्रदद्यादथवा मतिम् सो ऽपि विद्याधरो भूत्वा स्वर्गलोके चिरं वसेत् //
śṛṇuyādapi yaścaiva pradadyādathavā matim so 'pi vidyādharo bhūtvā svargaloke ciraṃ vaset //
Whoever listens to this teaching as well, and whoever gives support or gifts, or even offers counsel—he too becomes a Vidyādhara and dwells for a long time in the heavenly world.
This verse does not describe Pralaya; it is a phalaśruti statement promising heavenly merit (Svarga) and Vidyādhara status for hearing, giving, or offering counsel regarding the teaching.
It frames dharmic duty broadly: a householder (or king) gains merit not only by personal practice but also by supporting sacred instruction through listening (śravaṇa), charitable giving (dāna), and wise counsel (mati) to uphold the tradition.
No specific Vāstu/temple-building rule is stated here; the ritual takeaway is the general purāṇic principle that hearing and materially supporting the transmission of sacred teachings produces auspicious spiritual results.