Matsya Purana — Yadu Lineage
अहं वो ऽध्यापयिष्यामि विद्याः प्राप्तास्तु या मया ततस्ते हृष्टमनसो विद्यार्थमुपपेदिरे //
ahaṃ vo 'dhyāpayiṣyāmi vidyāḥ prāptāstu yā mayā tataste hṛṣṭamanaso vidyārthamupapedire //
“I shall teach you the sciences (vidyās) that have been attained by me.” Thereupon, delighted at heart, they approached him in order to receive that knowledge.
This verse does not directly describe Pralaya; it highlights the post-revelation role of Matsya as a teacher who transmits preserved knowledge, a theme often connected to restoring order after cosmic disruption.
It emphasizes the dharmic model of learning: rulers and householders should approach a qualified teacher with sincerity and discipline to receive vidyā, which supports righteous governance and proper conduct.
No specific Vāstu or ritual rule is stated; the takeaway is methodological—technical disciplines (including Vāstu-vidyā) are to be learned through formal instruction from an authoritative source.