Manusmriti

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अन्ये कृतयुगे धर्मास्त्रेतायां द्वापरेऽपरे । अन्ये कलियुगे नॄणां युगह्रासानुरूपतः ॥ ८५ ॥

sanskrit

One set of duties (is prescribed) for men in the Krita age, different ones in the Treta and in the Dvapara, and (again) another (set) in the Kali, in a proportion as (those) ages decrease in length.

english translation

anye kRtayuge dharmAstretAyAM dvApare'pare | anye kaliyuge nRRNAM yugahrAsAnurUpataH || 85 ||

hk transliteration by Sanscript