Matsya Purana — Description of Gomedaka and Puṣkara Dvīpas; the Lokāloka Boundary; Ocean Tide...
तस्मिन्स वसति ब्रह्मा साध्यैः सार्धं प्रजापतिः तत्र देवा उपासन्ते त्रयस्त्रिंशन्महर्षिभिः //
tasminsa vasati brahmā sādhyaiḥ sārdhaṃ prajāpatiḥ tatra devā upāsante trayastriṃśanmaharṣibhiḥ //
There Brahmā, the Prajāpati, dwells together with the Sādhyas. In that place the gods offer worship, along with the thirty-three great sages (mahārṣis).
Indirectly, it points to the ordered cosmic hierarchy that persists across cycles: Brahmā, Prajāpati, gods, and sages occupy a divine realm that frames creation and re-creation after pralaya.
By depicting the gods and sages as engaged in upāsanā (reverent worship/attendance), it reinforces the ideal of disciplined reverence and service—principles mirrored in royal patronage of dharma and a householder’s daily worship and respect for sages.
Ritually, the key term is upāsante—emphasizing worship and attendance upon the divine. While not a Vāstu rule itself, it supports the Purāṇic rationale for establishing sacred spaces (temples/altars) where devas and rishis are honored through proper rites.