Śatapatha Brāhmaṇa ("of a hundred paths") 2.5.2.42

2.5.2.42

tā ubhāveva sādayitvā sruco vyūhataḥ | sruco vyuhya paridhīntsamajya paridhimabhipadyāśrāvyādhvaryurevāheṣitā daivyā hotāro bhadravācyāya preṣito mānuṣaḥ sūktavākāyeti sūktavākaṃ hotā pratipadyate 'thaitā ubhāveva prastarau samullumpata ubhāvanupraharata ubhau tṛṇe apagṛhyopāsāte yadā hotā sūktavākamāha

They both then separate the spoons, after laying them (on the altars). Having separated the spoons, and anointed the enclosing-sticks; and having thereupon taken hold of the (middle) enclosing-stick, and called for the (Âgnîdhra's) 'Sraushat,' the Adhvaryu thus addresses (the Hotri), 'The divine Hotris are summoned for the proclamation of success; the human is called upon for the song of praise!' The Hotri then intones the song of praise (sûktavâka). Thereupon both seize their prastara-bunches and throw them (into the fires); both take a single straw each therefrom and remain sitting by (the fires); when the Hotri recites the song of praise,--