Two Competing Models: Ezra and Ruth
(טז) וַתֹּ֤אמֶר רוּת֙ אַל־תִּפְגְּעִי־בִ֔י לְעָזְבֵ֖ךְ לָשׁ֣וּב מֵאַחֲרָ֑יִךְ כִּ֠י אֶל־אֲשֶׁ֨ר תֵּלְכִ֜י אֵלֵ֗ךְ וּבַאֲשֶׁ֤ר תָּלִ֙ינִי֙ אָלִ֔ין עַמֵּ֣ךְ עַמִּ֔י וֵאלֹהַ֖יִךְ אֱלֹהָֽי׃ (יז) בַּאֲשֶׁ֤ר תָּמ֙וּתִי֙ אָמ֔וּת וְשָׁ֖ם אֶקָּבֵ֑ר כֹּה֩ יַעֲשֶׂ֨ה יְהוָ֥ה לִי֙ וְכֹ֣ה יֹסִ֔יף כִּ֣י הַמָּ֔וֶת יַפְרִ֖יד בֵּינִ֥י וּבֵינֵֽךְ׃

(16) And Ruth said: ‘Entreat me not to leave you, and to return from following after you; for where you go, I will go; and where you lodge, I will lodge; you people shall be my people, and your God my God; (17) where you die, will I die, and there will I be buried; the LORD do so to me,and more also, if anything but death part you and me.’

(א) וּכְכַלּ֣וֹת אֵ֗לֶּה נִגְּשׁ֨וּ אֵלַ֤י הַשָּׂרִים֙ לֵאמֹ֔ר לֹֽא־נִבְדְּל֞וּ הָעָ֤ם יִשְׂרָאֵל֙ וְהַכֹּהֲנִ֣ים וְהַלְוִיִּ֔ם מֵעַמֵּ֖י הָאֲרָצ֑וֹת ...(ב) כִּֽי־נָשְׂא֣וּ מִבְּנֹֽתֵיהֶ֗ם לָהֶם֙ וְלִבְנֵיהֶ֔ם וְהִתְעָֽרְבוּ֙ זֶ֣רַע הַקֹּ֔דֶשׁ בְּעַמֵּ֖י הָאֲרָצ֑וֹת... (ס)

(1) Now when these things were done, the princes drew near unto me, saying: ‘The people of Israel, and the priests and the Levites, have not separated themselves from the peoples of the lands....(2) For they have taken of their daughters for themselves and for their sons; so that the holy seed have mingled themselves with the peoples of the lands...

(א) וּכְהִתְפַּלֵּ֤ל עֶזְרָא֙ וּכְ֨הִתְוַדֹּת֔וֹ בֹּכֶה֙ וּמִתְנַפֵּ֔ל לִפְנֵ֖י בֵּ֣ית הָאֱלֹהִ֑ים נִקְבְּצוּ֩ אֵלָ֨יו מִיִּשְׂרָאֵ֜ל קָהָ֣ל רַב־מְאֹ֗ד אֲנָשִׁ֤ים וְנָשִׁים֙ וִֽילָדִ֔ים כִּֽי־בָכ֥וּ הָעָ֖ם הַרְבֵּה־בֶֽכֶה׃ (ס) (ב) וַיַּעַן֩ שְׁכַנְיָ֨ה בֶן־יְחִיאֵ֜ל מִבְּנֵ֤י עולם [עֵילָם֙] וַיֹּ֣אמֶר לְעֶזְרָ֔א אֲנַ֙חְנוּ֙ מָעַ֣לְנוּ בֵאלֹהֵ֔ינוּ וַנֹּ֛שֶׁב נָשִׁ֥ים נָכְרִיּ֖וֹת מֵעַמֵּ֣י הָאָ֑רֶץ וְעַתָּ֛ה יֵשׁ־מִקְוֶ֥ה לְיִשְׂרָאֵ֖ל עַל־זֹֽאת׃ (ג) וְעַתָּ֣ה נִֽכְרָת־בְּרִ֣ית לֵ֠אלֹהֵינוּ לְהוֹצִ֨יא כָל־נָשִׁ֜ים וְהַנּוֹלָ֤ד מֵהֶם֙ בַּעֲצַ֣ת אֲדֹנָ֔י וְהַחֲרֵדִ֖ים בְּמִצְוַ֣ת אֱלֹהֵ֑ינוּ וְכַתּוֹרָ֖ה יֵעָשֶֽׂה׃

(1) Now while Ezra prayed, and made confession, weeping and casting himself down before the house of God, there was gathered together unto him out of Israel a very great congregation of men and women and children; for the people wept very sore. (2) And Shecaniah the son of Jehiel, one of the sons of Elam, answered and said unto Ezra: ‘We have broken faith with our God, and have married foreign women of the peoples of the land; yet now there is hope for Israel concerning this thing. (3) Now therefore let us make a covenant with our God to put away all the wives, and such as are born of them, according to the counsel of the LORD, and of those that tremble at the commandment of our God; and let it be done according to the law.

(א) וַיֵּ֥שֶׁב יִשְׂרָאֵ֖ל בַּשִּׁטִּ֑ים וַיָּ֣חֶל הָעָ֔ם לִזְנ֖וֹת אֶל־בְּנ֥וֹת מוֹאָֽב׃ (ב) וַתִּקְרֶ֣אןָ לָעָ֔ם לְזִבְחֵ֖י אֱלֹהֵיהֶ֑ן וַיֹּ֣אכַל הָעָ֔ם וַיִּֽשְׁתַּחֲוּ֖וּ לֵֽאלֹהֵיהֶֽן׃ (ג) וַיִּצָּ֥מֶד יִשְׂרָאֵ֖ל לְבַ֣עַל פְּע֑וֹר וַיִּֽחַר־אַ֥ף יְהוָ֖ה בְּיִשְׂרָאֵֽל׃ (ד) וַיֹּ֨אמֶר יְהוָ֜ה אֶל־מֹשֶׁ֗ה קַ֚ח אֶת־כָּל־רָאשֵׁ֣י הָעָ֔ם וְהוֹקַ֥ע אוֹתָ֛ם לַיהוָ֖ה נֶ֣גֶד הַשָּׁ֑מֶשׁ וְיָשֹׁ֛ב חֲר֥וֹן אַף־יְהוָ֖ה מִיִּשְׂרָאֵֽל׃

(1) And Israel abode in Shittim, and the people began to commit harlotry with the daughters of Moab. (2) And they called the people unto the sacrifices of their gods; and the people did eat, and bowed down to their gods. (3) And Israel joined himself unto the Baal of Peor; and the anger of the LORD was kindled against Israel. (4) And the LORD said unto Moses: ‘Take all the chiefs of the people, and hang them up unto the LORD in face of the sun, that the fierce anger of the LORD may turn away from Israel.’

(א) כִּ֤י יְבִֽיאֲךָ֙ יְהוָ֣ה אֱלֹהֶ֔יךָ אֶל־הָאָ֕רֶץ אֲשֶׁר־אַתָּ֥ה בָא־שָׁ֖מָּה לְרִשְׁתָּ֑הּ וְנָשַׁ֣ל גּֽוֹיִם־רַבִּ֣ים ׀ מִפָּנֶ֡יךָ הַֽחִתִּי֩ וְהַגִּרְגָּשִׁ֨י וְהָאֱמֹרִ֜י וְהַכְּנַעֲנִ֣י וְהַפְּרִזִּ֗י וְהַֽחִוִּי֙ וְהַיְבוּסִ֔י שִׁבְעָ֣ה גוֹיִ֔ם רַבִּ֥ים וַעֲצוּמִ֖ים מִמֶּֽךָּ׃ (ב) וּנְתָנָ֞ם יְהוָ֧ה אֱלֹהֶ֛יךָ לְפָנֶ֖יךָ וְהִכִּיתָ֑ם הַחֲרֵ֤ם תַּחֲרִים֙ אֹתָ֔ם לֹא־תִכְרֹ֥ת לָהֶ֛ם בְּרִ֖ית וְלֹ֥א תְחָנֵּֽם׃ (ג) וְלֹ֥א תִתְחַתֵּ֖ן בָּ֑ם בִּתְּךָ֙ לֹא־תִתֵּ֣ן לִבְנ֔וֹ וּבִתּ֖וֹ לֹא־תִקַּ֥ח לִבְנֶֽךָ׃ (ד) כִּֽי־יָסִ֤יר אֶת־בִּנְךָ֙ מֵֽאַחֲרַ֔י וְעָבְד֖וּ אֱלֹהִ֣ים אֲחֵרִ֑ים וְחָרָ֤ה אַף־יְהוָה֙ בָּכֶ֔ם וְהִשְׁמִידְךָ֖ מַהֵֽר׃

(1) When the LORD thy God shall bring thee into the land whither thou goest to possess it, and shall cast out many nations before thee, the Hittite, and the Girgashite, and the Amorite, and the Canaanite, and the Perizzite, and the Hivite, and the Jebusite, seven nations greater and mightier than thou; (2) and when the LORD thy God shall deliver them up before thee, and thou shalt smite them; then thou shalt utterly destroy them; thou shalt make no covenant with them, nor show mercy unto them; (3) neither shalt thou make marriages with them: thy daughter thou shalt not give unto his son, nor his daughter shalt thou take unto thy son. (4) For he will turn away thy son from following Me, that they may serve other gods; so will the anger of the LORD be kindled against you, and He will destroy thee quickly.

והבועל ארמית, קנאין פוגעין בו.

And one who sleeps with an Aramean woman—zealots may attack him.

Yerushalmi Shabbat 1:7, 3d

Their daughters [a reference to the decree against the daughters of the Gentiles mentioned as one of the eighteen decrees made on the day that Beth Shammai outnumbered Beth Hillel]:

R. Elazar said, “On my oath, it is written, ‘You shall not intermarry with them’”.

R. Avin said: This is to prohibit the seven nations.