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Shloka 29

Matsya Purana — Measures of Time: Caturyuga Computation

एषा चतुर्युगाख्या तु साधिका त्वेकसप्ततिः कृतत्रेतादियुक्ता सा मनोरन्तरमुच्यते //

eṣā caturyugākhyā tu sādhikā tvekasaptatiḥ kṛtatretādiyuktā sā manorantaramucyate //

This unit called a “cycle of four yugas”—seventy-one of them (with an additional portion), comprising Kṛta, Tretā, and the rest—is declared to be the interval of a Manu (a Manvantara).

eṣāthis
eṣā:
caturyuga-ākhyācalled a four-yuga cycle
caturyuga-ākhyā:
tuindeed
tu:
sādhikāwith an addition/supplement (over and above the base count)
sādhikā:
ekasaptatiḥseventy-one
ekasaptatiḥ:
kṛta-tretā-ādi-yuktāconsisting of Kṛta, Tretā, etc. (i.e., the four yugas)
kṛta-tretā-ādi-yuktā:
that
:
manoḥof Manu
manoḥ:
antaraminterval/period
antaram:
ucyateis said/declared
ucyate:
Lord Matsya (in discourse to Vaivasvata Manu)
ManuCaturyugaKṛtayugaTretāyuga
ManvantaraYugaCosmologyTimeCyclesPuranicChronology

FAQs

It defines the time-structure governing creation’s recurring epochs: a Manvantara is measured as seventy-one four-yuga cycles (with an extra junctional portion), which frames the periodic renewals that culminate in larger dissolutions.

Indirectly, it situates dharma within cosmic time: royal and household duties are taught as yuga-conditioned, meaning conduct and governance are understood against the backdrop of changing ages within a Manu’s reign.

No direct Vāstu or ritual rule is stated; the takeaway is calendrical—ritual timing and Purāṇic reckoning often rely on yuga/Manvantara computations for situating sacred history and observances.