Matsya Purana — The Pushkara Manifestation
*श्रीभगवानुवाच यत्सत्यमक्षरं ब्रह्म ह्य् अष्टादशविधं तु तत् यत्सत्यं यदृतं तत्तु परं पदमनुस्मर //
*śrībhagavānuvāca yatsatyamakṣaraṃ brahma hy aṣṭādaśavidhaṃ tu tat yatsatyaṃ yadṛtaṃ tattu paraṃ padamanusmara //
The Blessed Lord said: “That which is Truth is the Imperishable Brahman; indeed, it is spoken of as eighteenfold. That which is Truth, that which is Ṛta (cosmic order)—remember that as the supreme state.”
It points beyond pralaya: Satya/Ṛta as Akṣara Brahman is imperishable and remains unchanged even when worlds dissolve, making it the stable refuge amid cosmic cycles.
By grounding dharma in Satya and Ṛta: a king’s justice and a householder’s conduct are legitimized when aligned with truthfulness and cosmic order, remembered as the highest aim rather than mere expediency.
No direct Vāstu or temple-rule instruction appears; however, the verse supplies the ritual-philosophical core—Satya and Ṛta—often invoked as the inner principle that should govern yajña, mantra-discipline, and sacred construction ethics.