Ezra 4:1 Halakhah

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;