KeU 4.7
उपनिषदं भो ब्रूहीत्युक्ता त उपनिषद्ब्राह्मीं वाव त उपनिषदमब्रूमेति
The disciple asked: O Master, teach me the Upanishad. (The teacher replied:) The Upanishad has been taught thee. We have certainly taught thee the Upanishad about Brahman.
Translated by Swami Paramananda
The Teacher: 'As you have asked me to tell you the Upanishad, the Upanishad has now been told you. We have told you the Brâhmî Upanishad.
Translated by F. Max Müller