Śatapatha Brāhmaṇa ("of a hundred paths") 1.5.3.6

1.5.3.6

sa yatraiva tiṣṭhanprayājebhya āśrāvayet | tata eva nāpakrāmetsaṃgrāmo vā eṣa saṃnidhīyate yaḥ prayājairyajate yataro vai saṃyattayoḥ parājayate 'pa vai saṃkrāmatyabhitarāmu vai jayaṅkrāmati tasmādabhitarāmabhitarāmeva krāmedabhitarāmabhitarāmāhutīrjuhuyāt

Let him (the Adhvaryu) not move from that same spot where he may be standing when he calls for the fore-offerings. A battle, it is true, is witnessed whenever any one performs the fore-offerings, and whichever of the two combatants is worsted, that one, no doubt, retreats; and he who obtains the victory, advances still nearer: he (the Adhvaryu) might therefore (feel inclined to) step nearer and nearer (to the fire), and offer the oblations (while moving) nearer and nearer.