Ṣaḍviṃśa Brāhmaṇa ("26th" book) 3.16

3.16

athaśabdo vākyādau samavaiti | yajño vai jananahetutvājjajñaḥ | ayameva yajña iti parokṣaṃ nāma āhuḥ | tadvido vyavaharanti | yaḥ pumān etaṃ yajñapratipādakaṃ vedaṃ viditvā anubrūte pravacanaṃ karoti eṣa vāva ayameva khalu jātaḥ 10 saphalajanmā bhavati | anyastu jāto'pyajātaprāya ityabhiprāyaḥ | kiṃ ca eṣo'yameva avaluptajarāyuḥ avaluptaṃ jarāyuḥ garbhaveṣṭanaṃ tatsthānīyamācchādakaṃ veda | tadarthaviṣayamajñānaṃ jarāyuśabdena vivakṣitam | tadavaluptaṃ yasya sa tathoktaḥ | kiṃ ca | eṣo'yamārtvijīnaḥ ṛtvikkarmārhaḥ | anuṣṭhānasya jñānapūrvakatvāt | api ca yadā vai yasmin eva kāle evaṃ yajñapratipādakaṃ vedmanu- 15 brūte | atha ha tadaiva etamanubruvāṇaṃ śṛṇvanti | asāvanvavocateti samyaganu- 16
vacanamakārṣīditi | prasūtakīrtirbhavatītyarthaḥ | taddhai yadā ayaṃ vikhyāto bhavati tadā khalu so'nuvaktā jāyate puṇyajanmā bhavati |
yajñeṣu prātaḥsavanādiṣu bahuṣu pradeśeṣu gāyatryādīnāṃ chandasāṃ nyūnākṣaratvamasti | tatra prātaḥsavane sāmānyena gāyatryā ūnākṣaratvaṃ stauti—