Atithi-prāpti and the Brāhmaṇa’s Deliberation on Triadic Dharma (अतिथिप्राप्तिः धर्मत्रयविचारश्च)
ततो वै द्वापरं नाम मिश्र: कालो भविष्यति । द्विपादहीनो धर्मश्न युगे तस्मिन् भविष्यति
tato vai dvāparaṃ nāma miśraḥ kālo bhaviṣyati | dvipāda-hīno dharmaś ca yuge tasmin bhaviṣyati ||
Then the age called Dvāpara will arise. That time will be a mixed one, where righteousness and unrighteousness are intermingled; and in that yuga, Dharma will be diminished—standing only on two feet, with two of its quarters lost.
वैशम्पायन उवाच
The verse teaches that moral order (Dharma) is not constant across ages: in Dvāpara Yuga it becomes weakened and mixed with adharma, symbolized by Dharma losing two of its four supports.
Vaiśaṃpāyana continues a yuga-description, announcing the coming of Dvāpara as an epoch characterized by a blend of virtue and vice, where Dharma no longer stands fully but is reduced to half its former strength.