Matsya Purana — Origins of Gods and Beings: Daksha’s Progeny
भुवः प्रमाणं सर्वत्र ज्ञात्वोर्ध्वम् अध एव च ततः सृष्टिं विशेषेण कुरुध्वमृषिसत्तमाः //
bhuvaḥ pramāṇaṃ sarvatra jñātvordhvam adha eva ca tataḥ sṛṣṭiṃ viśeṣeṇa kurudhvamṛṣisattamāḥ //
Having understood everywhere the measured extent of the worlds—both above and below—then, O best of sages, set forth the account of creation in a detailed and specific manner.
It frames creation (sṛṣṭi) as something to be explained after establishing cosmic measurements—suggesting that a proper account of emanation depends on knowing the structure of the worlds above and below, a common Purāṇic prerequisite before discussing cycles like pralaya and re-creation.
Indirectly, it models a dhārmic method: first establish correct knowledge and proportion (pramāṇa), then act or teach in detail—paralleling how a king or householder should make decisions only after understanding the full scope of circumstances.
Though not explicitly about Vāstu, the emphasis on pramāṇa (measure) anticipates Vāstu-śāstra logic: correct measurement and orientation (above/below; cosmic ordering) are foundational before detailed prescriptions are given.