Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
इत्येवमृषिभिर्गीतं दिव्यया संख्याया त्विह / दिव्येनैव प्रमाणेन युगसंख्याप्रकल्पनम्
ityevamṛṣibhirgītaṃ divyayā saṃkhyāyā tviha / divyenaiva pramāṇena yugasaṃkhyāprakalpanam
Thus have the ṛṣis sung here in divine enumeration; and by that very divine measure the reckoning of the yugas is set forth.