Keshava and Arjuna proceeded to battle on that prime car, for which the leader of the universe Agni who derives his effulgence from Brahman became the horses and
अग्निर्वैश्वानरः पूर्वो ब्रह्मेद्धः सप्तितां गतः। तस्माद् यः प्रथमं जातस्तं देवा ब्राह्मणं विदुः॥