CHĀNDOGYA UPANISHAD · 5.11.7

तान् होवाच ।
प्रातर् वः प्रतिवक्तास्मीति ।
ते ह समित्पाणयः पूर्वाह्णे प्रतिचक्रमिरे ।
तान् हानुपनीयैवैतद् उवाच ॥

tān hovāca ।
prātar vaḥ prativaktāsmīti ।
te ha samitpāṇayaḥ pūrvāhṇe praticakramire ।
tān hānupanīyaivaitad uvāca ॥

He said: 'To-morrow I shall give you an answer.' Therefore on the next morning they approached him, carrying fuel in their hands (like students), and he, without first demanding any preparatory rites, said to them:

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