Matsya Purana — Agastya’s Origin
तस्य पूजामकुर्वन्तं शशाप स मुनिर्नृपम् विदेहस्त्वं भवस्वेति ततस्तेनाप्यसौ मुनिः //
tasya pūjāmakurvantaṃ śaśāpa sa munirnṛpam videhastvaṃ bhavasveti tatastenāpyasau muniḥ //
When the king did not perform his worship, that sage cursed him, saying, “You shall become Videha (one without a body).” Thereupon, that sage too was, in turn, affected by him.
This verse does not discuss Pralaya; it focuses on a moral-legal narrative where neglect of due honor (pūjā) triggers a curse affecting royal fate.
It implies that a ruler must properly honor and ritually respect sages and prescribed worship; failure in pūjā is treated as a serious lapse of dharma with tangible consequences.
The ritual element is pūjā (formal honoring/worship). No Vāstu or temple-construction rule is stated, but it underscores the importance of correct ritual observance in Puranic ethics.