תּלמוד אויף עזרא 4:6

Ahashverosh: Rav said The brother of the head and the counterpart of the head — “The brother of the head”: the brother of Nebuchadnezzar the wicked who was called head, as it is written, “You are the head of gold” (Daniel 2:38). “The counterpart of the head”: the one slew, the other sought to slay; the one laid waste, the other sought to lay waste, as it is written, “And in the reign of Ahashverosh, in the beginning of his reign, wrote they an accusation against the inhabitants of Judah and Jerusalem” (Ezra 4:6).