CHĀNDOGYA UPANISHAD · 5.3.4

अथानु किम् अनु शिष्ठो ऽवोचथा यो हीमानि न विद्यात् ।
कथं सो ऽनुशिष्टो ब्रुवीतेति ।
स हायस्तः पितुर् अर्धम् एयाय ।
तं होवाचाननुशिष्य वाव किल मा भगवान् अब्रवीद् अनु त्वाशिषम् इति ॥

athānu kim anu śiṣṭho ’vocathā yo hīmāni na vidyāt ।
kathaṃ so ’nuśiṣṭo bruvīteti ।
sa hāyastaḥ pitur ardham eyāya ।
taṃ hovācānanuśiṣya vāva kila mā bhagavān abravīd anu tvāśiṣam iti ॥

'Then why did you say (you had been) instructed? How could anybody who did not know these things say that he had been instructed?' Then the boy went back sorrowful to the place of his father, and said: 'Though you had not instructed me, Sir, you said you had instructed me.

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)