זוהר, ואתחנן ט״וZohar, Vaetchanan 15

Segment 1א׳

תָּא חֲזֵי כְּתִיב, (שמות י״ט:י״ט) מֹשֶׁה יְדַבֵּר וְהָאֱלֹהִים יַעֲנֶנּוּ בְקוֹל. וְתָנֵינָן, מַאי בְקוֹל. בְּקוֹלוֹ שֶׁל מֹשֶׁה. וְשַׁפִּיר הוּא, בְּקוֹלוֹ שֶׁל מֹשֶׁה דַּיְיקָא, בְּהַהוּא קוֹל דְּאִיהוּ אָחִיד בֵּיהּ, עַל כָּל שְׁאַר נְבִיאִין. (מתמן משה אתזן על כלהו) וּבְגִין דְּאִיהוּ אִתְאֲחִיד עַל כֻּלְּהוּ, בְּהַהוּא קוֹל, דַּרְגָּא עִלָּאָה, הֲוָה אָמַר לְהוּ לְיִשְׂרָאֵל, יְיָ' אֱלֹהֶיךָ, אִיהוּ דַּרְגָּא דְּאִקְרֵי שְׁכִינְתָּא, דְּשַׁרְיָיא בְּגַוַויְיהוּ. זַכָּאָה חוּלָקֵיהּ.

For in connection with the verse, “Moses spoke and God answered him with a voice” (Ex. 19, 19), we have learnt that this voice was the voice of Moses, the Voice to which he was attached through his superiority over all the other prophets. And because he was attached to this higher grade he was able to say to Israel, “The Lord thy God”, namely, the grade called Shekinah which abode in their midst.’

Segment 2ב׳

וְאָמַר רִבִּי שִׁמְעוֹן, תָּנֵינָן, קְלָלוֹת שֶׁבְּתוֹרַת כֹּהֲנִים, מֹשֶׁה מִפִּי הַגְּבוּרָה אַמָרָן. וְשֶׁבְּמִשְׁנֵה תּוֹרָה, מֹשֶׁה מִפִּי עַצְמוֹ אָמָרָן. מַאי מִפִּי עַצְמוֹ. וְכִי סַלְּקָא דַּעְתָּךְ דְּאֲפִילּוּ אָת זְעֵירָא בְּאוֹרַיְיתָא, מֹשֶׁה אָמַר לֵיהּ מִגַּרְמֵיהּ.

R. Simeon further said: ‘We have learnt that the curses in Leviticus were uttered by Moses as coming from the mouth of the divine Might, but those in Deuteronomy were uttered by him as from the mouth of himself. What is meant by “as from the mouth of himself,’? Can it be thought that Moses said a single word of the Law of himself?

Segment 3ג׳

אֶלָּא שַׁפִּיר הוּא, וְהָא אִתְּעַרְנָא, מֵעַצְמוֹ לָא תָּנֵינָן, אֶלָּא מִפִּי עַצְמוֹ. וּמַאי אִיהוּ. הַהוּא קוֹל דְּאִיהוּ אָחִיד בֵּיהּ. וְעַל דָּא, הַלָּלוּ מִפִּי הַגְּבוּרָה. וְהַלָּלוּ מִפִּי עַצְמוֹ. מִפִּי הַהוּא דַּרְגָּא דְּאִתְקְשַׁר בֵּיהּ עַל שְׁאַר נְבִיאֵי מְהֵימְנֵי. וְעַל דָּא, בְּכָל אֲתָר אֱלֹהֶיךָ, וְהָכָא אֱלֹהֵינוּ.

No: what it refers to is the Voice to which he was attached, which is called “himself’, so that one set of curses were uttered from the mouth of the divine Might and the other of that grade to which he attained in virtue of his superiority over the other prophets. Hence, while in all other places he says “Thy God”, here (in the Shema) he says “Our God”.