Shatapatha Brahmana 1.1.4.11

1.1.4.11

atha haviṣkṛtamudvādayati | haviṣkṛdehi haviṣkṛdehīti vāgvai haviṣkṛdvācamevaitadvisṛjate vāgu vai yajñastadyajñamevaitatpunarupahvayate

He then calls the Havishkrit (preparer of the sacrificial food), 'Havishkrit, come hither! Havishkrit, come hither!' The Havishkrit no doubt is speech, so that he thereby frees speech from restraint. And speech, moreover, represents sacrifice, so that he thereby again calls the sacrifice to him.