Śatapatha Brāhmaṇa ("of a hundred paths") 3.1.3.24

3.1.3.24

athāśiṣāmārambhaṃ vācayati | ā vo devāsa īmahe vāmam prayatyadhvare ā vo devāsa āśiṣo yajñiyāso havāmaha iti tadasmai svāḥ satīrṛtvija āśiṣa āśāsate

He then makes him pronounce the beginning of the benedictions (Vâg. S. IV, 5), 'We approach you, O gods, for desirable goods, at the opening of the sacrifice; we call on you, O gods, for holy blessings.' Thereby the officiating priests invoke on him those blessings which are their own.