Matsya Purana — Origin of Soma
आशास्तं मुमुचुर्गर्भम् अशक्ता धारणे ततः समादायाथ तं गर्भम् एकीकृत्य चतुर्मुखः //
āśāstaṃ mumucurgarbham aśaktā dhāraṇe tataḥ samādāyātha taṃ garbham ekīkṛtya caturmukhaḥ //
Unable to sustain the embryo, they released that consecrated foetus; thereafter Caturmukha (four-faced Brahmā), taking up that embryo, unified it into a single whole.
It emphasizes creation through a “garbha” (cosmic seed/embryo): when others cannot sustain it, Brahmā gathers and consolidates it, reflecting an ordered reconstitution of life after instability (a common Purāṇic creation motif often paired with pralaya–recreation cycles).
By analogy, it highlights dhāraṇa (sustaining responsibility): when a burden cannot be borne, a competent authority must stabilize and integrate what is scattered—an ethical model for rulers/householders to preserve order, lineage, and social continuity.
While not explicitly about Vāstu, the key idea is ekīkaraṇa (consolidation into a unified form), a principle echoed in ritual and icon/structure formation: scattered elements are ritually “made one” into a stable, consecrated whole.