Atharva Veda 7.110: A prayer for success in battle

Resistless, Agni, Indra, smite his foemen for the worshipper, For best foe-slayers are ye both.

Agni I call, and Indra, foe-destroyers, swift moving, heroes, Gods who wield the thunder, Through whom they won the light in the beginning, these who have made all worlds their habitation.

The God Brihaspati hath won thy friendly favour with the cup.
With hymns, O Indra, enter us for the juice-pouring worshipper.