ChU 6.1.1
श्वेतकेतुर् हारुणेय आस । तं ह पितोवाच श्वेतकेतो वस ब्रह्मचर्यम् । न वै सोम्यास्मत् कुलीनो ऽननूच्य ब्रह्मबन्धुर् इव भवतीति
śvetaketur hāruṇeya āsa | taṃ ha pitovāca śvetaketo vasa brahmacaryam | na vai somyāsmat kulīno 'nanūcya brahmabandhur iva bhavatīti
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Harih, Om. There lived once Svetaketu Âruneya (the grandson of Aruna). To him his father (Uddâlaka, the son of Aruna) said: Svetaketu, go to school; for there is none belonging to our race, darling, who, not having studied (the Veda), is, as it were, a Brâhmana by birth only.'
Translated by F. Max Müller