Matsya Purana — Description of Pralaya: Drying
करिष्यतीति भगवान् इति कश्चिन् न बुध्यते //
kariṣyatīti bhagavān iti kaścin na budhyate //
No one truly understands what the Blessed Lord (Bhagavān) intends to do—(thinking), “He will do (this).”
It emphasizes that cosmic events like Pralaya unfold according to Bhagavān’s inscrutable will, beyond ordinary prediction or control.
It implies that one should focus on dharma and right conduct rather than claiming certainty over outcomes, since the Lord’s intent cannot be fully known.
No direct Vāstu or ritual rule is stated; the takeaway is a general caution against overconfidence—rituals and plans should be done with humility and dharmic intent.