Atharva Veda · Chapter 7.115

agna indraśca dāśuṣe hato vṛtrāṇyaprati /
ubhā hi vṛtrahantamā

yābhyāmajayantsvaragra eva yāvātasthaturbhuvanāni viśvā /
pra carṣaṇīvṛṣaṇā vajrabāhū agnimindraṃ vṛtrahaṇā huve'ham

upa tvā devo agrabhīccamasena bṛhaspatiḥ /
indra gīrbhirna ā viśa yajamānāya sunvate