Matsya Purana — The Madana-Dvādaśī Vow and the Birth of the Maruts
अजानन्किल तत्कार्यम् आत्मनः शुभमाचरन् ततो वर्षशतान्ते सा न्यूने तु दिवसैस् त्रिभिः //
ajānankila tatkāryam ātmanaḥ śubhamācaran tato varṣaśatānte sā nyūne tu divasais tribhiḥ //
Indeed, though not understanding the full consequence of that deed, he performed what was auspicious for himself; and then, at the end of a hundred years—short by only three days—that event came to pass.
It emphasizes precise cosmic/ritual timing—events ripen at a fixed measure (here, nearly a hundred years), a narrative device often used in the Pralaya prelude to show that destiny unfolds on schedule.
It teaches that one should still perform śubha-karma (beneficial, dharmic action) even without fully grasping outcomes; the fruit of right action manifests in due time.
No direct Vāstu/temple rule is stated; the key ritual takeaway is the emphasis on exact calendrical reckoning (years and days) for when results or prescribed events occur.