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.
Rashi on Ezra
And in the reign of Ahasuerus who reigned after Cyrus; he is the Ahasuerus who took Esther.
Rashi on Ezra
against the dwellers of Judea and Jerusalem to inform on them and to chide them not to build the Temple.