Matsya Purana — Agastya’s Origin
तस्मादेकेन वपुषा मुनिरूपेण मानुषे मारुतेन समं लोके तव जन्म भविष्यति //
tasmādekena vapuṣā munirūpeṇa mānuṣe mārutena samaṃ loke tava janma bhaviṣyati //
Therefore, taking a single bodily form—appearing as a sage in the human world—your birth in this world will occur together with Māruta.
Indirectly, it reflects the post-crisis restoration theme common to Pralaya cycles: after cosmic upheavals, divine agency continues by entering the human realm in a sage-form to guide the next order of beings.
By portraying divine guidance arriving in a muni-rūpa (sage-form), the verse reinforces that rulers and householders should heed dharmic counsel from qualified sages—especially during transitions in dynasties and social order.
No direct Vāstu or temple-ritual rule is stated; the key takeaway is the Purāṇic motif of a deity assuming a sage-form, which often frames later instructions on rites, kingship, and sacred foundations in adjoining passages.