Matsya Purana — Intermediate Dissolution
यः शरीराद् अभिध्याय सिसृक्षुर्विविधं जगत् अप एव ससर्जादौ तासु वीर्यम् अवासृजत् //
yaḥ śarīrād abhidhyāya sisṛkṣurvividhaṃ jagat apa eva sasarjādau tāsu vīryam avāsṛjat //
自らの内より観想し、多様なる世界を創出せんと欲した彼は、まず水を造り、ついでその水の中に自らの生殖の力(ヴィールヤ)を注ぎ置いた。
It describes the opening movement of creation (sarga): before differentiated worlds appear, the primeval Waters are produced first, and the divine “seed” (vīrya) is placed in them as the causal power from which further creation unfolds.
By analogy, it models purposeful creation: a king or householder should act after clear intention (abhidhyāna) and establish a stable foundation first—like “waters” as the base—before expanding projects such as governance, family duties, or charitable works.
Direct Vāstu rules are not stated, but the principle is foundational: rites and constructions begin by establishing a purified base element (often water in ritual purification) before “installing” potency—mirroring how consecration (pratiṣṭhā) places sacred power into a prepared locus.