Śatapatha Brāhmaṇa ("of a hundred paths") 1.7.3.14

1.7.3.14

ā yajatāmejyā iṣa iti | prajā vā iṣastā evaitadyāyajūkāḥ karoti tā imāḥ prajā yajamānā arcantyaḥ śrāmyantyaścaranti

'By sacrifice may he obtain for himself food worthy of sacrifice!' the food, doubtless, is these creatures: he thereby makes them eager to sacrifice, and these creatures go on sacrificing, worshipping and performing austerities.