ChU 1.11.6
अथ हैनम् उद्गातोपससाद । उद्गातर् या देवतोद्गीथम् अन्वायत्ता तां चेद् अविद्वान् उद्गास्यसि मूर्धा ते विपतिष्यतीति मा भगवान् अवोचत् । कतमा सा देवता इति
atha hainam udgātopasasāda | udgātar yā devatodgītham anvāyattā tāṃ ced avidvān udgāsyasi mūrdhā te vipatiṣyatīti mā bhagavān avocat | katamā sā devatā iti
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Then the Udgâtri approached him, saying: 'Sir, you said to me, "Udgâtri, if you, without knowing the deity which belongs to the udgîtha, are going to sing it, your head will fall off,"—which then is that deity?'
Translated by F. Max Müller