Matsya Purana — The Episode of Madhu and Kaiṭabha: Gunas
स्वपन्नेव ततः श्रीमान् बहुयोजनविस्तृतम् बाहुं नारायणो ब्रह्मा कृतवानात्ममायया //
svapanneva tataḥ śrīmān bahuyojanavistṛtam bāhuṃ nārāyaṇo brahmā kṛtavānātmamāyayā //
Then, as if in a dream, the glorious Nārāyaṇa—Brahmā himself—by his own māyā, fashioned an arm extending across many yojanas.
It highlights that during cosmic crisis the divine can instantly manifest vast forms through māyā, implying sovereignty over space and scale even amid dissolution.
Indirectly, it reinforces reliance on dharma and divine order in times of upheaval: rulers and householders should act steadily, recognizing that ultimate protection and cosmic regulation rest with the supreme lord.
No direct Vāstu or ritual rule appears; the key idea is “measure beyond measure” (many yojanas), a cosmological motif later echoed in temple iconography where deities are depicted with superhuman proportions (viśvarūpa-style grandeur).