Śatapatha Brāhmaṇa ("of a hundred paths") 3.9.4.9

3.9.4.9

sa mimīte | indrāya tvā vasumate rudravata itīndro vai yajñasya devatā tasmādāhendrāya tveti vasumate rudravata iti tadindramevānu vasūṃśca rudrāṃścābhajatīndrāya tvādityavata iti tadindramevānvādityānābhajatīndrāya tvābhimātighna iti sapatno vā abhimātirindrāya tvā sapatnaghna ityevaitadāha so 'syoddhāro yathā śreṣṭhanyoddhāra evamasyaiṣa ṛte devebhyaḥ

He metes out with (Vâg. S. VI, 32), 'Thee for Indra, with the Vasus, with the Rudras!' For Indra is the deity of the sacrifice: therefore he says, 'Thee for Indra;' and by saying 'with the Vasus, with the Rudras,' he assigns a share, along with (or after) Indra, to the Vasus and the Rudras.--'Thee for Indra, with the Âdityas!' whereby he assigns a share to the Âdityas along with Indra.--'Thee for Indra, the slayer of foes!' a foe is an enemy: 'Thee for Indra, the slayer of enemies,' he means to say. This is his (Indra's) special share: as there is a special share for a chief, so is this his special share apart from the (other) gods.