Musar for Sotah 66:2
ולילף קול ממשה ענייה ענייה גמיר קול קול לא גמיר
But let him derive that from the analogous use of the word 'voice' in connection with Moses! — He had learnt [from his teacher] to draw an inference from the analogous use of the word 'answer' but not from 'voice'.<span class="x" onmousemove="('comment',' [No inference can be drawn from the analogous use of a word (a Gezerah shawah, v. Glos.) which has not been received on tradition from a teacher.] ');"><sup>3</sup></span> It has been similarly taught: R. Judah says: Wherever [in Scripture the words] 'thus', both in the form of 'koh' and 'kakah', or 'answer and say' occur, [what has to be spoken] must only be in the holy tongue. The word 'koh' is found in 'Thus ye shall bless',<span class="x" onmousemove="('comment',' Num. VI, 23, the priestly benediction which must be in Hebrew. ');"><sup>4</sup></span>