וּבְמַלְכוּת֙ אֲחַשְׁוֵר֔וֹשׁ בִּתְחִלַּ֖ת מַלְכוּת֑וֹ כָּתְב֣וּ שִׂטְנָ֔ה עַל־יֹשְׁבֵ֥י יְהוּדָ֖ה וִירוּשָׁלִָֽם׃ (ס)
And in the reign of Ahasuerus, in the beginning of his reign, wrote they an accusation against the inhabitants of Judah and Jerusalem.
Read halakhic rulings (Jewish law) on Ezra 4:6: and classical halakhic sources.