Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
षड्विंशतिसहस्राणि वर्षाणि मानुषाणि तु / वर्षाणां तु शतं ज्ञेयं दिव्यो ह्येष विधिः स्मृतः
ṣaḍviṃśatisahasrāṇi varṣāṇi mānuṣāṇi tu / varṣāṇāṃ tu śataṃ jñeyaṃ divyo hyeṣa vidhiḥ smṛtaḥ
Twenty-six thousand human years; and a hundred years are to be known as the divine measure—such is the heavenly ordinance remembered.