Rabbi Shimon Bar Yochai

“ Behold, this proves it.
וּבָתַר דְּאִסְתַּלַּק הַאי מַבּוּעָא מִתַּמָּן, שַׁלִּיטַת מָרָה בְּאַתְרָהָא, הֲדָא הוּא דִכְתִיב (שמות טו, כג) וַיָּבֹאוּ מָרָתָה, וְרָזָא דְמִלָּה וַיְמָרַרוּ אֶת חַיֵּיהֶם בַּעֲבוֹדָה קָשָׁה וְגוֹמֵר שם א יד, דָּא קוּשְׁיָא, בְּחֹמֶר דָּא קַל וָחֹמֶר, וְהָא אוּקְמוּהוּ. So Yisrael were in this condition until the wood was shown to them ”

“ Marah [the master, H] /bitter " for the Lower Shekhina is the "fountain of gardens" (Song 4:15) that has no pausing, the drop that is drawn from the brain, and from which so many drops are drawn forth, which are (Ps. 45:15) , "Maidens after her [YK] , her friends [friends of YK] ." ”

“ And behold, EYTa"N reversed is TaNY"A (Mishna) that helps him through the exile. And of this it says (Num. 24:21) , "EYTN moshavekha w'sim ba'sela` kinnekha/ (If) firm be thy dwelling-place, (then) thy nest be set in the rock." ”