Atharvaveda · Sūkta 7.64

7.64.1

अयमग्निः सत्पतिर्वृद्धवृष्णो रथीव पत्तीन् अजयत्पुरोहितः ।
नाभा पृथिव्यां निहितो दविद्युतदधस्पदं कृणुतां ये पृतन्यवः ॥ ७.६४.१ ॥

This Agni, lord of the true, a mighty bull, as priest set in front, conquers as a charioteer conquers foot-soldiers. Placed in the navel of the earth he shines brightly; let those who desire battle make him their lower place.