ChU 4.9.3
श्रुतं ह्य् एव मे भगवद्दृशेभ्य आचार्याद् धैव विद्या विदिता साधिष्ठं प्रापतीति । तस्मै ह एतद् एव उवाच । अत्र ह न किंचन वीयायेति वीयायेति
śrutaṃ hy eva me bhagavaddṛśebhya ācāryād dhaiva vidyā viditā sādhiṣṭhaṃ prāpatīti | tasmai ha etad eva uvāca | atra ha na kiṃcana vīyāyeti vīyāyeti
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'For I have heard from men like you, Sir, that only knowledge which is learnt from a teacher (Âkârya), leads to real good.' Then he taught him the same knowledge. Nothing was left out, yea, nothing was left out.
Translated by F. Max Müller