Matsya Purana — Yadu Lineage
भार्गवो वाङ्गिरा वापि भगवानेष नो गुरुः स्थिता वयं निदेशे ऽस्य साधु त्वं गच्छ माचिरम् //
bhārgavo vāṅgirā vāpi bhagavāneṣa no guruḥ sthitā vayaṃ nideśe 'sya sādhu tvaṃ gaccha māciram //
Whether Bhārgava or Vāṅgira, this blessed one is our revered guru. We remain established in his command; therefore, go at once, without delay.
This verse does not describe pralaya directly; it emphasizes disciplined obedience to a revered guru, a value that underlies correct conduct in all cosmic or social upheavals described elsewhere in the Matsya Purana.
It highlights dharmic governance and household discipline: a king or householder should act promptly under rightful counsel (guru/elders), maintaining steadiness in authorized instruction rather than acting from impulse or delay.
No explicit Vastu or ritual procedure is stated; the practical takeaway is procedural—tasks (including rites or building works) should be executed promptly according to the appointed authority’s instruction.