Matsya Purana — Yayāti and His Sons: The Exchange of Youth and Old Age
पूर्णे वर्षसहस्रे तु त्वदीयं यौवनं त्व् अहम् दत्त्वा सम्प्रतिपत्स्यामि पाप्मानं जरया सह //
pūrṇe varṣasahasre tu tvadīyaṃ yauvanaṃ tv aham dattvā sampratipatsyāmi pāpmānaṃ jarayā saha //
When a thousand years are completed, I shall give back to you your youth; and I will then take upon myself the burden of sin together with old age.
This verse does not address Pralaya directly; it teaches a karmic principle: moral burdens (pāpmāna) and bodily decline (jarā) are consequences that can be assumed or transferred within a narrative framework to illustrate responsibility and the cost of desire.
It underscores accountability: enjoyment (youth) is not free from consequence, and a ruler/householder must ultimately face or accept the results of actions. The implied dharma is restraint and readiness to bear the outcomes rather than evade them.
No Vāstu, temple-building, or ritual procedure is mentioned in this verse; its focus is ethical-philosophical, using “youth” and “old age” as narrative symbols for pleasure and its karmic residue.