Gopathabrahmana 1.3.8

1.3.8

atha yaḥ purastād aṣṭāv ājyabhāgān vidyān madhyataḥ pañca havirbhāgāḥ ṣaṭ prājāpatyā upariṣṭād aṣṭāv ājyabhāgān vidyāt_
atha yo gāyatrīṃ hariṇīṃ jyotiṣpakṣāṃ sarvair yajñair yajamānaṃ svargaṃ lokam abhivahantīṃ vidyāt_
atha yaḥ apaṅktiṃ pañcapadāṃ saptadaśākṣarāṃ sarvair yajñair yajamānaṃ svargaṃ lokam abhivahantīṃ vidyāt
tasmai ha niṣkaṃ prayacchann uvācānūcāno ha vai svaidāyanāsi suvarṇaṃ vai suvarṇavide dadāmīti
tad upayamya niścakrāma
tatrāpavavrāja yatretaro babhūva
taṃ ha papraccha kim eṣa gautamasya putra iti_
eṣa brahmā brahmāputra iti hovāca yad enaṃ kaś cid upavadetota mīmāṃseta ha vā mūrdhā vā asya vipatet prāṇā vainaṃ jahyur iti
te mitha eva cikrandeyur viprāpavavraja yatretaro babhūva
te prātaḥ samitpāṇaya upodeyur upāyāmo bhavantam iti
kim artham iti
yān eva no bhavāṃs tān hyaḥ praśnān apṛcchat tān eva no bhavān vyācakṣīteti
tatheti
tebhya etān praśnān vyācacaṣṭe || 8 ||