Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
सप्त षष्टिस्तथान्यानि नियुतान्यधिकानि तु / विशतिश्च सहस्राणि कालो ऽयं साधिकं विना
sapta ṣaṣṭistathānyāni niyutānyadhikāni tu / viśatiśca sahasrāṇi kālo 'yaṃ sādhikaṃ vinā
To this are added sixty-seven niyutas and twenty thousand; thus is this span of time, with no remainder beyond it.