Śatapatha Brāhmaṇa ("of a hundred paths") 4.1.2.15

4.1.2.15

athāto gṛhṇātyeva | upayāmagṛhīto 'sītyukta upayāmasya bandhurantaryaca maghavanpāhi somamitīndro vai maghavānindro yajñasya netā tasmādāha maghavanniti pāhi somamiti gopāya somamityevaitadāhoruṣya rāya eṣo yajasveti paśavo vai rāyo gopāya paśūnityevaitadāheṣo yajasveti prajā vā iṣastā evaitadyāyajūkāḥ karoti tā imāḥ prajā yajamānā arcantyaḥ śrāmyantyaścaranti

He draws (the Antaryâma graha) therefrom with (Vâg. S. VII, 4), 'Thou art taken with a support!'--The significance of the Upayâma has been told.--'Restrain thou, O mighty (Indra), guard Soma!' the mighty, forsooth, is Indra; and Indra is the leader of the sacrifice: wherefore he says 'O mighty!' and by 'guard Soma' he means to say 'protect Soma!' 'Preserve the riches! gain thee food in the sacrifice!'--riches mean cattle: 'Protect the cattle' he thereby means to say. 'Gain thee food in the sacrifice!'--food means creatures: he thus makes these eager to sacrifice, and these creatures go on sacrificing and praising and toiling.