Matsya Purana — Origin of Soma
ब्रह्मत्वमगमत्तस्य उपद्रष्टा हरिः स्वयम् सदस्याः सनकाद्यास्तु राजसूयविधौ स्मृताः //
brahmatvamagamattasya upadraṣṭā hariḥ svayam sadasyāḥ sanakādyāstu rājasūyavidhau smṛtāḥ //
Through that rite he attained Brahmatva, the state of Brahmāhood, and Hari Himself stood as the overseeing witness. In the procedure of the Rājasūya, Sanaka and the other sages are remembered as the officiating members of the assembly.
This verse does not describe Pralaya; it emphasizes ritual efficacy—attainment of an exalted spiritual status through the Rājasūya—and the divine witnessing role of Hari.
It frames righteous kingship as inseparable from Vedic duty: the king’s legitimacy and spiritual merit are tied to properly performed royal rites (like Rājasūya) conducted with qualified sages and under divine sanction.
The significance is ritual (not architectural): Hari is named as the upadraṣṭā (supervising witness), and Sanaka and other sages are specified as sadasyas—key officiants/assembly members required for the correct Rājasūya procedure.