Śatapatha Brāhmaṇa ("of a hundred paths") 8.4.2.3

8.4.2.3

agnirbhāgo 'si | dīkṣāyā ādhipatyamiti vāgvai dīkṣāgnaye bhāgaṃ kṛtvā vāca ādhipatyamakarodbrahma spṛtaṃ trivṛtstoma iti brahma prajānāṃ trivṛtā stomena pāpmanā mṛtyoraspṛṇot

[He lays them down, with, Vâg. S. XIV, 24-26], Agni's share thou art, Dîkshâ's lordship!'--Dîkshâ, doubtless, is Speech: having bestowed a share on Agni, he bestows lordship on Speech;--'the Brahman is freed; the Trivrit-stoma!'--by means of the thrice-threefold hymn-form he freed the Brahman (priesthood) for living beings from evil, from death.