Both rushed against Bhima in the van of the battle, as the lord of the water (i.e. Varuna) (had rushed against) Taraka, the foremost of the Daitayas (in days of yore).
संग्रामशिरसो मध्ये भीमं द्वावप्यधावताम्। यथाम्बुपतिमित्रौ हि तारकं दैत्यसत्तमम्॥