Mishnayos Rosh Hashanah Perek 3 Mishnah 8

Incidental to the discussion of the required intent when sounding the shofar, the mishna cites the verse: “And it came to pass, when Moses held up his hand, that Israel prevailed; and when he let down his hand, Amalek prevailed” (Exodus 17:11). It may be asked: Did the hands of Moses make war when he raised them or break war when he lowered them? Rather, the verse comes to tell you that as long as the Jewish people turned their eyes upward and subjected their hearts to their Father in Heaven, they prevailed, but if not, they fell. Similarly, you can say: The verse states: “Make for yourself a fiery serpent, and set it upon a pole; and it shall come to pass, that everyone that is bitten, when he sees it, he shall live” (Numbers 21:8). Once again it may be asked: Did the serpent kill, or did the serpent preserve life? Rather, when the Jewish people turned their eyes upward and subjected their hearts to their Father in Heaven, they were healed, but if not, they rotted from their snakebites. Returning to its halakhic discussion, the mishna continues: A deaf-mute, an imbecile, or a minor who sounds the shofar cannot discharge the obligation on behalf of the community. This is the principle with regard to similar matters: Whoever is not obligated to do a certain matter cannot discharge the obligation on behalf of the community.

וְהָיָה כַּאֲשֶׁר יָרִים משֶׁה יָדוֹ וְגָבַר יִשְׂרָאֵל וְגוֹ' (שמות יז), וְכִי יָדָיו שֶׁל משֶׁה עוֹשׂוֹת מִלְחָמָה אוֹ שׁוֹבְרוֹת מִלְחָמָה. אֶלָּא לוֹמַר לְךָ, כָּל זְמַן שֶׁהָיוּ יִשְׂרָאֵל מִסְתַּכְּלִים כְּלַפֵּי מַעְלָה וּמְשַׁעְבְּדִין אֶת לִבָּם לַאֲבִיהֶם שֶׁבַּשָּׁמַיִם הָיוּ מִתְגַּבְּרִים. וְאִם לָאו, הָיוּ נוֹפְלִין. כַּיּוֹצֵא בַדָּבָר אַתָּה אוֹמֵר (במדבר כא), עֲשֵׂה לְךָ שָׂרָף וְשִׂים אֹתוֹ עַל נֵס, וְהָיָה כָּל הַנָּשׁוּךְ וְרָאָה אֹתוֹ וָחָי. וְכִי נָחָשׁ מֵמִית, אוֹ נָחָשׁ מְחַיֶּה. אֶלָּא, בִּזְמַן שֶׁיִּשְׂרָאֵל מִסְתַּכְּלִין כְּלַפֵּי מַעְלָה וּמְשַׁעְבְּדִין אֶת לִבָּם לַאֲבִיהֶן שֶׁבַּשָּׁמַיִם, הָיוּ מִתְרַפְּאִים, וְאִם לָאו, הָיוּ נִמּוֹקִים. חֵרֵשׁ, שׁוֹטֶה, וְקָטָן, אֵין מוֹצִיאִין אֶת הָרַבִּים יְדֵי חוֹבָתָן. זֶה הַכְּלָל, כֹּל שֶׁאֵינוֹ מְחֻיָּב בַּדָּבָר, אֵינוֹ מוֹצִיא אֶת הָרַבִּים יְדֵי חוֹבָתָן: