Śatapatha Brāhmaṇa ("of a hundred paths") 14.2.2.8

14.2.2.8

indrāya tvābhimātighne svāheti ayam vā indro yo'yam pavate tasmā evainaṃ juhoti tasmādāhendrāya tvetyabhimātighna iti sapatno vāabhimātirindrāya tvā sapatnaghna ityevaitadāha so'syoddhāro yathā śreṣṭhasyoddhāra evamasyaiṣa ṛte devebhyaḥ

'To Indra, the slayer of the evil-minded,--thee, hail!'--Indra indeed is he who blows here: it is to him he thus offers it, and therefore he says, 'To Indra--thee;' and as to his saying, 'to the slayer of the evil-minded,' the evil-minded one being an enemy, he thereby means to say, 'To Indra, the slayer of enemies,--thee!' This is his (Indra's) special share: even as there is a share for a chief, so is this his (share) apart from the (other) gods.