Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
दिव्यानां पार्थिवानां च वंशानां चैव सर्वशः तपनस्तेजसो योगाद् आदित्य इति गद्यते //
divyānāṃ pārthivānāṃ ca vaṃśānāṃ caiva sarvaśaḥ tapanastejaso yogād āditya iti gadyate //
In every respect—among both the divine and the earthly royal lineages—because he is conjoined with the blazing splendor (tejas) of the Sun, Tapana, he is therefore spoken of as “Āditya.”
This verse is not about Pralaya; it clarifies a solar designation—why certain divine and royal lineages are termed “Āditya” due to association with the Sun’s tejas (radiance).
By linking royal lineages to solar tejas, the verse implies a king’s ideal should mirror the Sun—dispelling disorder, sustaining life, and upholding dharma through steady, impartial power.
No direct Vāstu or ritual rule is stated; the key takeaway is symbolic—solar tejas (radiance) is a legitimizing theological marker used in lineage and epithet formation.