Matsya Purana — The Pushkara Manifestation
*मत्स्य उवाच स्थित्वा च तस्मिन्कमले ब्रह्मा ब्रह्मविदां वरः ऊर्ध्वबाहुर्महातेजास् तपो घोरं समाश्रितः //
*matsya uvāca sthitvā ca tasminkamale brahmā brahmavidāṃ varaḥ ūrdhvabāhurmahātejās tapo ghoraṃ samāśritaḥ //
Lord Matsya said: Standing upon that lotus, Brahmā—the foremost among the knowers of Brahman—radiant with great splendor, raised his arms aloft and undertook a fierce austerity.
It points to the post-dissolution (or pre-creation) transition where Brahmā, positioned on the primordial lotus, initiates creation through intense tapas—an essential Puranic motif linking austerity to cosmic manifestation.
Though not prescribing social duties directly, it sets an ethical model: disciplined effort (tapas), steadiness, and purposeful resolve. In Matsya Purana’s broader dharma frame, rulers and householders are likewise expected to practice self-control and sustained responsibility to uphold order.
No direct Vāstu or temple-rule detail appears, but the lotus as a cosmic seat (ādhāra) is ritually significant—later reflected in lotus-based maṇḍala symbolism used in worship layouts and iconographic/ritual visualization.