Matsya Purana — Genealogy of Kaśyapa: Ādityas
तुषिता नाम ये देवाश् चाक्षुषस्यान्तरे मनोः वैवस्वते ऽन्तरे चैते आदित्या द्वादश स्मृताः //
tuṣitā nāma ye devāś cākṣuṣasyāntare manoḥ vaivasvate 'ntare caite ādityā dvādaśa smṛtāḥ //
Those gods known as the Tuṣitas—during the Manvantara of Cākṣuṣa Manu—and likewise in the Manvantara of Vaivasvata Manu, are remembered as the Twelve Ādityas.
It frames time through Manvantaras (cosmic administrations between dissolutions), indicating that divine offices like the Twelve Ādityas recur across cycles rather than being one-time events.
By emphasizing Ādityas (solar deities linked with order, seasons, and lawful governance), it supports the Matsya Purana theme that righteous rule and household discipline should align with cosmic order (ṛta/dharma) across time.
No direct Vāstu rule is stated, but identifying Ādityas supports solar-oriented ritual timing and Sūrya/Āditya worship frameworks often used when choosing auspicious days and directions in temple and domestic rites.