Matsya Purana — Purūravas Witnesses the Sports of Apsarases and Gandharvas; Attains the Grace...
पुष्पोच्चयप्रसक्तानां क्रीडन्तीनां यथासुखम् चेष्टा नानाविधाकाराः पश्यन्नपि न पश्यति //
puṣpoccayaprasaktānāṃ krīḍantīnāṃ yathāsukham ceṣṭā nānāvidhākārāḥ paśyannapi na paśyati //
Even while looking, one does not truly see—just as those absorbed in gathering flowers, playing at ease, move about in many different ways, yet remain inattentive to what is before them.
It does not describe Pralaya directly; it teaches a psychological principle—attachment and play can cloud perception, a cause of ignorance that, in broader Purana teaching, keeps beings bound through cycles of time.
It warns that comfort and distraction can make one negligent; a king or householder must stay attentive to duties—protection, justice, rites, and ethical conduct—rather than being absorbed in pleasures and trivial pursuits.
No Vastu or ritual procedure is specified; the takeaway is general: ritual and governance require alertness—mere outward activity without attentive awareness becomes ineffective.