Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
तदा प्रवर्त्तते धर्मो वर्णाश्रमविभागशः / मर्यादास्थापनार्थं च दण्डनीतिः प्रवर्त्तते
tadā pravarttate dharmo varṇāśramavibhāgaśaḥ / maryādāsthāpanārthaṃ ca daṇḍanītiḥ pravarttate
Then dharma proceeds according to the divisions of varṇa and āśrama; and to establish due order, the polity of punishment (daṇḍanīti) also comes into force.