Matsya Purana — Description of Gomedaka and Puṣkara Dvīpas; the Lokāloka Boundary; Ocean Tide...
दशाधिकं तथाकाशं वायोर्भूतान्यधारयत् भूतादिर्धारयन्व्योम तस्माद्दशगुणस्तु वै //
daśādhikaṃ tathākāśaṃ vāyorbhūtānyadhārayat bhūtādirdhārayanvyoma tasmāddaśaguṇastu vai //
Space (ākāśa) is likewise tenfold greater; it supports the beings/elements of air (vāyu). The primal source of the elements (bhūtādi), which upholds space itself, is therefore said to be ten times greater.
It presents a cosmological hierarchy of support and magnitude: air is supported by space, and space is supported by a subtler causal principle (bhūtādi), each described as tenfold greater—an idea often used to explain how the universe is structured and can be withdrawn back into subtler causes during pralaya.
Indirectly, it frames a worldview of ordered dependence—gross realities rest on subtler supports—encouraging rulers and householders to uphold “supporting causes” (dharma, discipline, proper rites) rather than focusing only on visible outcomes.
While not a direct Vāstu rule, the verse’s emphasis on ākāśa (space) as a sustaining principle aligns with Vāstu and ritual thinking where controlled space (ākāśa/antarikṣa) and proportional measures are foundational for altar and temple layouts.