Mishnah Yadayim 4:3: On that very day they said: What is the status [of the lands] of Ammon and Moav on the Seventh [the Sabbatical year of agrarian rest]? Rabbi Tarphon decreed: [those residing in those lands must pay] tithes for the poor. And Rabbi Elazar ben Azaria decreed: [they must bring] ma'aser sheini [the second tithe of produce, which must be taken to Jerusalem and consumed there]. Rabbi Yishmael said, "Elazar ben Azaria, the onus is upon you to prove your assertion, for you rule stringently, and anyone who rules more stringently, the onus is upon him to bring proof!" Rabbi Elazar ben Azaria said to him, "Yishmael, my brother, I have not deviated from the regular order of the years [with regard to the series indicating which tithes one is obligated to bring each year], but my brother Tarphon has deviated, therefore the onus to bring proof rests upon him!" Rabbi Tarphon responded, "Egypt is outside of the land [of Israel], and Ammon and Moav are outside of the land [of Israel]; just as Egypt [has a requirement that its inhabitants pay] tithes for the poor during the Seventh [the Sabbatical year], so too Ammon and Moav [should require their inhabitant to likewise pay] tithes for the poor during the Seventh." Rabbi Elazar ben Azaria responded, "Babylon is outside of the land [of Israel], and Ammon and Moav are outside of the land [of Israel]; just as Babylon [pays] ma'aser sheni during the Seventh, so too Ammon and Moav [should likewise pay] ma'aser sheini during the Seventh." Rabbi Tarphon said, "Egypt, being near [to the land of Israel], was made [to require the payment of] tithes for the poor, so that the poor of Israel may be supported by it during the Seventh; so too Ammon and Moav, which are near [the land of Israel], are made [to require the payment of] tithes for the poor, so that the poor of Israel may be supported by them during the Seventh." Rabbi Elazar ben Azaria said to him, "You thereby are like one who provides them with increased money, yet truly only loses souls! Would you defraud the heavens from sending down neither dew nor rain, as it is said (Malachi 3:8), 'Shall a man defraud God? For you have defrauded Me. Yet you say: Through what have we defrauded You? Through tithes and terumah.'" Rabbi Yehoshua said, "I will thereby respond as to my brother Tarphon [i.e. expanding on his reasoning], although not regarding the [specific] matter of which he spoke: [the decree regarding the status of] Egypt is a new enactment, [whereas that regarding] Babylon is an old enactment, and the matter in question before us is a new enactment; let a conclusion regarding a new enactment be drawn from a new enactment, and do not let a conclusion regarding a new enactment be drawn from an old enactment! [Moreover, the decree regarding the status of] Egypt is an enactment of the elders, [whereas that regarding] Babylon is an enactment of the prophets, and the matter in question before us is an enactment of the elders; let a conclusion regarding an enactment of the elders be drawn from an enactment of the elders, and do not let a conclusion regarding an enactment of the elders be drawn from an enactment of the prophets!" They [the Sages] voted and concluded: [The lands of] Ammon and Moav must tithe the tithes for the poor during the Seventh. When Rabbi Yose ben Durmaskit came to Rabbi Eliezer in Lod, he said to him, "What innovative idea was there among you in the Beit Midrash today?" He said to him, "They voted and concluded that Ammon and Moav must tithe the tithes for the poor during the Seventh." Rabbi Eliezer wept and exclaimed, (Psalms 25:14) "'The secrets of the Lord are for those who fear Him, and His covenant to be made known to them!' Go forth and tell them, 'Think nothing of your vote! I have a received tradition from Rabban Yochanan ben Zakkai, who heard it from his rabbi, and his rabbi from his rabbi, up to the law of Moshe from Sinai, that Ammon and Moab tithe the tithes for the poor during the Seventh.'"

בּוֹ בַיּוֹם אָמְרוּ, עַמּוֹן וּמוֹאָב, מַה הֵן בַּשְּׁבִיעִית. גָּזַר רַבִּי טַרְפוֹן, מַעְשַׂר עָנִי. וְגָזַר רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה, מַעֲשֵׂר שֵׁנִי. אָמַר רַבִּי יִשְׁמָעֵאל, אֶלְעָזָר בֶּן עֲזַרְיָה, עָלֶיךָ רְאָיָה לְלַמֵּד, שֶׁאַתָּה מַחְמִיר, שֶׁכָּל הַמַּחְמִיר, עָלָיו רְאָיָה לְלַמֵּד. אָמַר לוֹ רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה, יִשְׁמָעֵאל אָחִי, אֲנִי לֹא שִׁנִּיתִי מִסֵּדֶר הַשָּׁנִים, טַרְפוֹן אָחִי שִׁנָּה, וְעָלָיו רְאָיָה לְלַמֵּד. הֵשִׁיב רַבִּי טַרְפוֹן, מִצְרַיִם חוּץ לָאָרֶץ, עַמּוֹן וּמוֹאָב חוּץ לָאָרֶץ, מַה מִּצְרַיִם מַעְשַׂר עָנִי בַשְּׁבִיעִית, אַף עַמּוֹן וּמוֹאָב מַעְשַׂר עָנִי בַשְּׁבִיעִית. הֵשִׁיב רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה, בָּבֶל חוּץ לָאָרֶץ, עַמּוֹן וּמוֹאָב חוּץ לָאָרֶץ, מַה בָּבֶל מַעֲשֵׂר שֵׁנִי בַשְּׁבִיעִית, אַף עַמּוֹן וּמוֹאָב מַעֲשֵׂר שֵׁנִי בַשְּׁבִיעִית. אָמַר רַבִּי טַרְפוֹן, מִצְרַיִם שֶׁהִיא קְרוֹבָה, עֲשָׂאוּהָ מַעְשַׂר עָנִי, שֶׁיִּהְיוּ עֲנִיֵּי יִשְׂרָאֵל נִסְמָכִים עָלֶיהָ בַּשְּׁבִיעִית, אַף עַמּוֹן וּמוֹאָב, שֶׁהֵם קְרוֹבִים, נַעֲשִׂים מַעְשַׂר עָנִי, שֶׁיִּהְיוּ עֲנִיֵּי יִשְׂרָאֵל נִסְמָכִים עֲלֵיהֶם בַּשְּׁבִיעִית. אָמַר לוֹ רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה, הֲרֵי אַתָּה כִמְהַנָּן מָמוֹן, וְאֵין אַתָּה אֶלָּא כְמַפְסִיד נְפָשׁוֹת. קוֹבֵעַ אַתָּה אֶת הַשָּׁמַיִם מִלְּהוֹרִיד טַל וּמָטָר, שֶׁנֶּאֱמַר (מלאכי ג), הֲיִקְבַּע אָדָם אֱלֹהִים כִּי אַתֶּם קֹבְעִים אֹתִי וַאֲמַרְתֶּם בַּמֶּה קְבַעֲנוּךָ הַמַּעֲשֵׂר וְהַתְּרוּמָה. אָמַר רַבִּי יְהוֹשֻׁעַ, הֲרֵינִי כְמֵשִׁיב עַל טַרְפוֹן אָחִי, אֲבָל לֹא לְעִנְיַן דְּבָרָיו. מִצְרַיִם מַעֲשֶׂה חָדָשׁ, וּבָבֶל מַעֲשֶׂה יָשָׁן, וְהַנִּדּוֹן שֶׁלְּפָנֵינוּ מַעֲשֶׂה חָדָשׁ. יִדּוֹן מַעֲשֶׂה חָדָשׁ מִמַּעֲשֶׂה חָדָשׁ, וְאַל יִדּוֹן מַעֲשֶׂה חָדָשׁ מִמַּעֲשֶׂה יָשָׁן. מִצְרַיִם מַעֲשֵׂה זְקֵנִים, וּבָבֶל מַעֲשֵׂה נְבִיאִים, וְהַנִּדּוֹן שֶׁלְּפָנֵינוּ מַעֲשֵׂה זְקֵנִים. יִדּוֹן מַעֲשֵׂה זְקֵנִים מִמַּעֲשֵׂה זְקֵנִים, וְאַל יִדּוֹן מַעֲשֵׂה זְקֵנִים מִמַּעֲשֵׂה נְבִיאִים. נִמְנוּ וְגָמְרוּ, עַמּוֹן וּמוֹאָב מְעַשְּׂרִין מַעְשַׂר עָנִי בַּשְּׁבִיעִית. וּכְשֶׁבָּא רַבִּי יוֹסֵי בֶּן דֻּרְמַסְקִית אֵצֶל רַבִּי אֱלִיעֶזֶר בְּלוֹד, אָמַר לוֹ, מַה חִדּוּשׁ הָיָה לָכֶם בְּבֵית הַמִּדְרָשׁ הַיּוֹם. אָמַר לוֹ, נִמְנוּ וְגָמְרוּ, עַמּוֹן וּמוֹאָב מְעַשְּׂרִים מַעְשַׂר עָנִי בַּשְּׁבִיעִית. בָּכָה רַבִּי אֱלִיעֶזֶר וְאָמַר, סוֹד ה' לִירֵאָיו וּבְרִיתוֹ לְהוֹדִיעָם (תהלים כה). צֵא וֶאֱמֹר לָהֶם, אַל תָּחֹשּׁוּ לְמִנְיַנְכֶם. מְקֻבָּל אֲנִי מֵרַבָּן יוֹחָנָן בֶּן זַכַּאי, שֶׁשָּׁמַע מֵרַבּוֹ, וְרַבּוֹ מֵרַבּוֹ עַד הֲלָכָה לְמשֶׁה מִסִּינַי, שֶׁעַמּוֹן וּמוֹאָב מְעַשְּׂרִין מַעְשַׂר עָנִי בַּשְּׁבִיעִית:

Mishnah Yadayim 4:4: On that very day, Yehuda, an Ammonite convert, came and stood before them in the Beit Midrash, and said to them, "What is my status with regard to whether I can enter [via marriage] into the congregation [of Israel]?" Rabban Gamliel said to him, "You are prohibited." Rabbi Yehoshua said to him, "You are permitted." Rabban Gamliel said to him, "The verse says, (Deuteronomy 23:4) 'An Ammonite and a Moavite may not enter into the congregation of the Lord, even to the tenth generation,' and so forth." Rabbi Yehoshua said to him, "And are the Ammonites or Moavites still [dwelling] in their own place? Sancheriv, king of Assyria, already arose and blended all the nations, as the verse says, (Isaiah 10:13) 'I have removed the borders of nations, and I have plundered their treasures, and like a great warrior laid low the inhabitants.'" Rabban Gamliel said to him, "The verse [also] states, (Jeremiah 49:6) 'And afterwards I shall return the captives of the children of Ammon,' and they are already returned." Rabbi Yehoshua said to him, "The verse [also] states, (Amos 9:14) 'And I shall return the captives of my nation Israel,' [and Judah], and they are not yet returned." They [the Sages, subsequently] permitted him [the Ammonite convert] to enter into the congregation.

בּוֹ בַיּוֹם בָּא יְהוּדָה, גֵּר עַמּוֹנִי, וְעָמַד לִפְנֵיהֶן בְּבֵית הַמִּדְרָשׁ. אָמַר לָהֶם, מָה אֲנִי לָבֹא בַקָּהָל. אָמַר לוֹ רַבָּן גַּמְלִיאֵל, אָסוּר אָתָּה. אָמַר לוֹ רַבִּי יְהוֹשֻׁעַ, מֻתָּר אָתָּה. אָמַר לוֹ רַבָּן גַּמְלִיאֵל, הַכָּתוּב אוֹמֵר (דברים כג), לֹא יָבֹא עַמּוֹנִי וּמוֹאָבִי בִּקְהַל ה' גַּם דּוֹר עֲשִׂירִי וְגוֹ'. אָמַר לוֹ רַבִּי יְהוֹשֻׁעַ, וְכִי עַמּוֹנִים וּמוֹאָבִים בִּמְקוֹמָן הֵן. כְּבָר עָלָה סַנְחֵרִיב מֶלֶךְ אַשּׁוּר וּבִלְבֵּל אֶת כָּל הָאֻמּוֹת, שֶׁנֶּאֱמַר (ישעיה י), וְאָסִיר גְּבוּלֹת עַמִּים וַעֲתוּדוֹתֵיהֶם שׁוֹשֵׂתִי וְאוֹרִיד כַּאבִּיר יוֹשְׁבִים. אָמַר לוֹ רַבָּן גַּמְלִיאֵל, הַכָּתוּב אוֹמֵר (ירמיה מט), וְאַחֲרֵי כֵן אָשִׁיב אֶת שְׁבוּת בְּנֵי עַמּוֹן, וּכְבָר חָזְרוּ. אָמַר לוֹ רַבִּי יְהוֹשֻׁעַ, הַכָּתוּב אוֹמֵר (עמוס ט), וְשַׁבְתִּי אֶת שְׁבוּת עַמִּי יִשְׂרָאֵל וִיהוּדָה, וַעֲדַיִן לֹא שָׁבוּ. הִתִּירוּהוּ לָבֹא בַקָּהָל: