Śatapatha Brāhmaṇa ("of a hundred paths") 4.5.3.4

4.5.3.4

taṃ vai harivatyarcā gṛhṇāti | harivatīṣu stuvate harivatīranuśaṃsati vīryaṃ vai hara indro 'surāṇāṃ sapatnānāṃ samavṛṅkta tatho evaiṣa etadvīryaṃ haraḥ sapatnānāṃ saṃvṛṅkte tasmāddharivatyarcā gṛhṇāti harivatīṣu stuvate harivatīranuśaṃsati

He draws it with a verse to the lord of the bay steeds (Indra Harivant); they (the Udgâtris) chant verses to (Indra) Harivant, and he (the Hotri) afterwards recites verses to (Indra) Harivant. For Indra seized upon the strength, the fury (haras) of his enemies, the Asuras; and in like manner does he (the sacrificer) now seize upon the strength, the fury of his enemies: therefore he draws the graha with a verse to (Indra) Harivant; they chant verses to Harivant, and he (the Hotri) afterwards recites verses to Harivant.