Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
पञ्चाशीतिसहस्राणि ते राजन्त्यजरा नृपाः / असंगगतयस्तेषां चतस्रश्चक्रवर्त्तिनाम्
pañcāśītisahasrāṇi te rājantyajarā nṛpāḥ / asaṃgagatayasteṣāṃ catasraścakravarttinām
Those kings, free from decay, reign for eighty-five thousand years; and for the cakravartins, four unobstructed courses of movement are spoken of.