Matsya Purana — Catalogue of the Eighteen Puranas
नामतस्तानि वक्ष्यामि शृणुध्वं मुनिसत्तमाः ब्रह्मणाभिहितं पूर्वं यावन्मात्रं मरीचये //
nāmatastāni vakṣyāmi śṛṇudhvaṃ munisattamāḥ brahmaṇābhihitaṃ pūrvaṃ yāvanmātraṃ marīcaye //
I shall now declare them by their names—listen, O best of sages—exactly as Brahmā formerly taught them, in due measure, to Marīci.
It frames the teaching as an authoritative, earlier revelation from Brahmā to Marīci, indicating that the coming material (often cosmological names/measures) is part of the standard creation-cosmology transmission rather than a new speculation.
Indirectly, it models dharmic learning: rulers and householders are expected to follow reliable śāstric lineages of instruction (guru-paramparā), hearing teachings “in due measure” and applying them appropriately rather than inventing doctrine.
No specific Vāstu or ritual rule is stated in this verse; however, the phrase “yāvanmātram” (“to proper measure”) signals the Purāṇic emphasis on correct proportions and measured instruction—an idea that becomes crucial in Vāstu Śāstra and ritual procedure elsewhere in the Matsya Purāṇa.