The open space, lying between two armies drawn up for fight, forms the altar of such as sacrificer, and the three Vedas are his three sacrificial fires. Upon that altar, helped by the recitation of the Vedas, he celebrates his sacrifice.
यदा तूभयतो व्यूहे भवत्याकाशमग्रतः॥ सास्य वेदिस्तदा यज्ञैर्नित्यं वेदास्त्रयोऽग्नयः।