Śatapatha Brāhmaṇa ("of a hundred paths") 5.1.3.11

5.1.3.11

taddhaike | vāca uttamamālabhante yadi vai prajāpateḥ paramasti vāgeva tadetadvācamujjayāma iti vadantastadu tathā na kuryātsarvaṃ vā idam prajāpatiryadime lokā yadidaṃ kiṃ ca sā yadevaiṣu lokeṣu vāgvadati tadvācamujjayati tasmādu tannādriyeta

Now, some seize the last (victim) for Vâk (Speech), thinking, 'If there be anything beyond Pragâpati, that is Speech: we thus win Speech.' But let him not do it in this wise; for Pragâpati is everything here,--these worlds and everything there is;--whatever speech speaks in these worlds, that speech he wins: therefore he need not heed this.