וַֽיִּשְׁמְע֔וּ צָרֵ֥י יְהוּדָ֖ה וּבִנְיָמִ֑ן כִּֽי־בְנֵ֤י הַגּוֹלָה֙ בּוֹנִ֣ים הֵיכָ֔ל לַיהוָ֖ה אֱלֹהֵ֥י יִשְׂרָאֵֽל׃
Now when the adversaries of Judah and Benjamin heard that the children of the captivity were building a temple unto the LORD, the God of Israel;
Rashi on Ezra
the adversaries of Judah and Benjamin They are the nations whom Sannecherib settled in the land Israel, as it says (II Kings 17:24): “And the king of Assyria brought [people] from Babylonia and from Cuthah and from Avvah and from Hamath and from Sepharvaim, and he settled them in the cities of Samaria instead of the Children of Israel.”