וְעַתָּ֗ה תְּנ֥וּ תוֹדָ֛ה לַיהוָ֥ה אֱלֹהֵֽי־אֲבֹתֵיכֶ֖ם וַעֲשׂ֣וּ רְצוֹנ֑וֹ וְהִבָּֽדְלוּ֙ מֵעַמֵּ֣י הָאָ֔רֶץ וּמִן־הַנָּשִׁ֖ים הַנָּכְרִיּֽוֹת׃
Now therefore make confession unto the LORD, the God of your fathers, and do His pleasure; and separate yourselves from the peoples of the land, and from the foreign women.’
Read halakhic rulings (Jewish law) on Ezra 10:11: and classical halakhic sources.