Matsya Purana — Catalogue of the Eighteen Puranas
*मत्स्य उवाच पुराणं सर्वशास्त्राणां प्रथमं ब्रह्मणा स्मृतम् अनन्तरं च वक्त्रेभ्यो वेदास्तस्य विनिर्गताः //
*matsya uvāca purāṇaṃ sarvaśāstrāṇāṃ prathamaṃ brahmaṇā smṛtam anantaraṃ ca vaktrebhyo vedāstasya vinirgatāḥ //
Matsya said: “Among all śāstras, the Purāṇa was first remembered (composed/retained) by Brahmā; thereafter, from his mouths the Vedas issued forth.”
It highlights the cosmogonic sequence of sacred knowledge: Brahmā first retains the Purāṇic tradition, and then the Vedas manifest from him—presenting revelation as emerging at the start of creation rather than focusing on dissolution.
By asserting the Purāṇa and Veda as foundational sources, it implies that royal governance and household dharma should be guided by these authoritative traditions—ethics, ritual duty, and social order are to be grounded in śāstric revelation.
No specific Vāstu or temple rule is stated, but the verse establishes the scriptural authority from which later ritual and architectural prescriptions (vidhi) in the Purāṇa derive.