savitrā tu virocanaḥ

yamah-Yamaraja; tu-indeed; kalanabhena-with Kalanabha; visvakarma-Visvakarma; mayena-with Maya; vai-indeed; sambarah-Sambara; yuyudhe-fought; tvastra-with Tvasta; savitra-with the sun-god; tu-indeed; virocanah-the demon Virocana.