וַיְהִי֙ ק֣וֹל הַשּׁוֹפָ֔ר הוֹלֵ֖ךְ וְחָזֵ֣ק מְאֹ֑ד מֹשֶׁ֣ה יְדַבֵּ֔ר וְהָאֱלֹהִ֖ים יַעֲנֶ֥נּוּ בְקֽוֹל׃
A głos trąby wzmagał się coraz silniej; Mojżesz przemawiał, a Bóg odpowiadał mu gromem.
Reshit Chokhmah
Lulyani Bar Sibri said in the name of Rabbi Yitzchak: See the humility that is in the hand of Hashem. See what it is written there (Shmot 19:19): "Moshe spoke and Hashem answered him b'kol." It should have been the other way, "Hashem speaks and Moshe answered." So with this, we see that his [Hashem's] humility is vast.