Atharvavedabrahmana 6.8

6.8

atha yaḥ purastādaṣṭāvājyabhāgān vidyāt madhyataḥ pañca havirbhāgāḥ, ṣaṭ prājāpatyāḥ upariṣṭādaṣṭāvājyabhāgān vidyāt atha
yo gāyatrīṃ hariṇīṃ jyotiṣmatāṃ sarvairṛttairyajamānaṃ svargaṃ lokamabhivahantīṃ vidyāt atha yaḥ paṅktiṃ pañcapadāṃ saptadaśākṣarāṃ sarvairṛttairyajamānaṃ svargaṃ lokamabhivahantīṃ vidyāt asmai ha niṣka̍ prayannuvācānūcāno ha vai svaidāyanā sa suvarṇaṃ vai suvarṇavide dadāmīti tadupayamya
niṣkrāma, tatrāpavrāja yacetaro babhūva, taṃ ha papraccha kimeṣa gotamasya
putra ityeṣa brahmā brahmaputra iti hovāca, yadenaṃ kaścidupavadetota
momāṃseta ha vā mūrddhā vā asya vipatet, prāṇā vainaṃ jahyuriti, te
mitha eva cikrandairyuvi prāpavrāja yacetaro babhūvuste prātaḥ samitpāṇayaupodeyurupāyāmo bhavantamiti, kimarthamiti yāneva no bhavāṃstāṃ hya
praśnānapṛcchadyāneva no bhavān vyācakṣīyeti, tatheti tebhya etān
praśnān vyācacaṣṭe