ChU 4.10.2
तं जायोवाच तप्तो ब्रह्मचारी कुशलम् अग्नीन् परिचचारीत् । मा त्वा अग्नयः परिप्रवोचन् । प्रब्रूह्य् अस्मा इति । तस्मै हाप्रोच्यैव प्रवासां चक्रे
taṃ jāyovāca tapto brahmacārī kuśalam agnīn paricacārīt | mā tvā agnayaḥ paripravocan | prabrūhy asmā iti | tasmai hāprocyaiva pravāsāṃ cakre
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Then his wife said to him: 'This student, who is quite exhausted (with austerities), has carefully tended your fires. Let not the fires themselves blame you, but teach him.' The teacher, however, went away on a journey without having taught him.
Translated by F. Max Müller