On the termination of the Treta, will come the mixed Yoga known by the name of Dvapara. In that cycle, virtue will lose two quarters and only two quarters thereof will remain.
ततो वै द्वापरं नाम मिश्रः कालो भविष्यति। द्विपादहीनो धर्मश्च युगे तस्मिन् भविष्यति॥