(33) Adonai spoke to Moses, saying: (34) Say to the Israelite people: On the fifteenth day of this seventh month there shall be the a seven-day Festival of Sukkot for Adonai.
(יד) רַבִּי מָנֵי פָּתַח (תהלים לה, י): כָּל עַצְמֹתַי תֹּאמַרְנָה ה' מִי כָמוֹךָ, לֹא נֶאֱמַר פָּסוּק זֶה אֶלָּא בִּשְׁבִיל לוּלָב, הַשִּׁדְרָה שֶׁל לוּלָב דּוֹמָה לַשִּׁדְרָה שֶׁל אָדָם, וְהַהֲדַס דּוֹמֶה לָעַיִן, וַעֲרָבָה דּוֹמָה לַפֶּה, וְהָאֶתְרוֹג דּוֹמֶה לַלֵּב, אָמַר דָּוִד אֵין בְּכָל הָאֵיבָרִים גָּדוֹל מֵאֵלּוּ, שֶׁהֵן שְׁקוּלִין כְּנֶגֶד כָּל הַגּוּף, הֱוֵי: כָּל עַצְמוֹתַי תֹּאמַרְנָה.
(14) Rabbi Mani opened, "'All of my bones shall say, "Adonai, who is like you"' (Psalms 35:10). This verse was only stated for the sake of the lulav (the four species). The spine of the palm branch is similar to the spine of man. And the myrtle is similar to the eye. And the willow is similar to the mouth. And the etrog (citron), is similar to the heart. David said, 'In all of the limbs, there are no greater ones than these, as they are compared to the entire body.' This is [what is meant] by 'All of my bones shall say.'"
(יב) דָּבָר אַחֵר, פְּרִי עֵץ הָדָר, אֵלּוּ יִשְׂרָאֵל, מָה אֶתְרוֹג זֶה יֵשׁ בּוֹ טַעַם וְיֵשׁ בּוֹ רֵיחַ, כָּךְ יִשְׂרָאֵל יֵשׁ בָּהֶם בְּנֵי אָדָם שֶׁיֵּשׁ בָּהֶם תּוֹרָה וְיֵשׁ בָּהֶם מַעֲשִׂים טוֹבִים. כַּפֹּת תְּמָרִים, אֵלּוּ יִשְׂרָאֵל, מָה הַתְּמָרָה הַזּוֹ יֵשׁ בּוֹ טַעַם וְאֵין בּוֹ רֵיחַ, כָּךְ הֵם יִשְׂרָאֵל יֵשׁ בָּהֶם שֶׁיֵּשׁ בָּהֶם תּוֹרָה וְאֵין בָּהֶם מַעֲשִׂים טוֹבִים. וַעֲנַף עֵץ עָבֹת, אֵלּוּ יִשְׂרָאֵל, מָה הֲדַס יֵשׁ בּוֹ רֵיחַ וְאֵין בּוֹ טַעַם, כָּךְ יִשְׂרָאֵל יֵשׁ בָּהֶם שֶׁיֵּשׁ בָּהֶם מַעֲשִׂים טוֹבִים וְאֵין בָּהֶם תּוֹרָה. וְעַרְבֵי נָחַל, אֵלּוּ יִשְׂרָאֵל, מָה עֲרָבָה זוֹ אֵין בָּהּ טַעַם וְאֵין בָּהּ רֵיחַ, כָּךְ הֵם יִשְׂרָאֵל יֵשׁ בָּהֶם בְּנֵי אָדָם שֶׁאֵין בָּהֶם לֹא תּוֹרָה וְלֹא מַעֲשִׂים טוֹבִים, וּמָה הַקָּדוֹשׁ בָּרוּךְ הוּא עוֹשֶׂה לָהֶם, לְאַבְּדָן אִי אֶפְשָׁר, אֶלָּא אָמַר הַקָּדוֹשׁ בָּרוּךְ הוּא יֻקְשְׁרוּ כֻלָּם אֲגֻדָּה אַחַת וְהֵן מְכַפְּרִין אֵלּוּ עַל אֵלּוּ, וְאִם עֲשִׂיתֶם כָּךְ אוֹתָהּ שָׁעָה אֲנִי מִתְעַלֶּה, הֲדָא הוּא דִכְתִיב (עמוס ט, ו): הַבּוֹנֶה בַשָּׁמַיִם מַעֲלוֹתָו, וְאֵימָתַי הוּא מִתְעֲלֶה כְּשֶׁהֵן עֲשׂוּיִין אֲגֻדָּה אַחַת, שֶׁנֶּאֱמַר (עמוס ט, ו): וַאֲגֻדָּתוֹ עַל אֶרֶץ יְסָדָהּ, לְפִיכָךְ משֶׁה מַזְהִיר לְיִשְׂרָאֵל: וּלְקַחְתֶּם לָכֶם בַּיּוֹם הָרִאשׁוֹן.
(12) Another explanation: "The fruit of a beautiful tree" - these are [referring to] Israel. Just like this citron (etrog), which has taste and has smell, so too Israel has among them people that have Torah and have good deeds. "The branches of a date palm" - these are [referring to] Israel. Just like this date, which has taste and has no smell, so too Israel has among them those that have Torah but do not have good deeds. "And a branch of a braided tree (a myrtle)" - these are [referring to] Israel. Just like this myrtle, which has smell and has no taste, so too Israel has among them those that have good deeds but do not have Torah. "And brook willows" - these are [referring to] Israel. Just like this willow, which has no smell and has no taste, so too Israel has among them people that have no Torah and have no good deeds. And what does HaKadosh Baruch Hu, do to them? To destroy them is impossible, but rather HaKadosh Baruch Hu, said "bind them all together [into] one grouping and these will atone for those." And if you will have done that, I will be elevated at that time. This is [the meaning of] what is written (Amos 9:6), "Who built Their upper chambers in heaven" (indicating God's elevation). And when is God elevated? When they make one grouping, as it is stated (Ibid.), "and established Their grouping on the earth." Hence Moshe warned Israel, "And you shall take for yourselves on the first day."
The comparison of the willow to those who possess neither Torah knowledge nor good deeds seems to contradict a reference (in Eruvin 19a) to the verse, "Your cheek is like a piece of pomegranate" (Song of Songs 4:3), which states: Do not read "your cheek" but "those of you who are empty," i.e. even your ignorant people are full of good deeds like the pomegranate is full of seeds. However, what is meant there is the avoidance of sins, for even the "empty" Jews avoid pork and other forbidden food (we note that this was written in the 16th c.)...Moreover, good deeds (which those in the fourth category fail to practice) may imply the uncommon superior kindness and piety of saintly altruists and not to the routine mitzvot, like tzitzit, tefilin, and prayer, of which even those who are 'empty' are full of, like the pomegranate.
R. Shmuel Yaffe Ashkenazi, Yefe Torah on Midrash Rabba