Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
इयं सायन्तनी वेला विहारस्येह वर्तते कृत्वोपलेपनं पुष्पैर् अलंकुरु गृहं मम //
iyaṃ sāyantanī velā vihārasyeha vartate kṛtvopalepanaṃ puṣpair alaṃkuru gṛhaṃ mama //
“This is the evening hour appointed here for rest and recreation. Having smeared and purified the place, adorn my house with flowers.”
Nothing directly: the verse is practical and domestic, focusing on auspicious timing (evening) and preparatory purification rather than cosmology or Pralaya.
It reflects householder discipline: keeping the dwelling ritually clean (upalepana) and auspiciously adorned (flowers), and observing proper times (velā) for rest and orderly household conduct.
Upalepana (smearing/plastering) is a standard Vastu-linked purification step before auspicious activities; decorating with flowers is a mangala practice that sacralizes the home environment.