Matsya Purana — The Episode of Madhu and Kaiṭabha: Gunas
*श्रीभगवानुवाच बाढं युवां तु प्रवरौ भविष्यत्कालसंभवे भविष्यतो न संदेहः सत्यमेतद्ब्रवीमि वाम् //
*śrībhagavānuvāca bāḍhaṃ yuvāṃ tu pravarau bhaviṣyatkālasaṃbhave bhaviṣyato na saṃdehaḥ satyametadbravīmi vām //
The Blessed Lord said: “Indeed. In the time that is yet to come, you two will arise as the foremost among beings. Of what is to be, there is no doubt—this I declare to you both as truth.”
Directly, it does not describe Pralaya mechanics; it functions as a divine guarantee within the broader Purana frame that spans cycles of time (future Manvantara events), emphasizing certainty about what will unfold.
It underscores the Purāṇic ethic of steadfastness: when the Lord affirms a future role or fruit, the implied instruction is to continue one’s dharma without doubt, trusting that rightful action and divine ordinance yield assured outcomes.
No Vāstu-śāstra or ritual procedure is specified in this verse; its significance is devotional and narrative—establishing the Lord’s authoritative promise, a common preface to later instructions (including ritual or dharma teachings) in the Matsya Purana.