Ecclesiastes Rabbah 10:13

¹“The beginning of the words of his mouth is foolishness, and the end of his mouth is evil debauchery” (Ecclesiastes 10:13). “The beginning of the words of his mouth is foolishness” – as [Cyrus] said: “He is the God, who is in Jerusalem” (Ezra 1:3). “And the end of his mouth is evil debauchery” – as he recanted and abrogated his decrees and said: Whoever has crossed has crossed, and whoever has not crossed shall not cross. Another matter: “The beginning of the words of his mouth is foolishness” – this is Aḥashverosh, as it is stated: “And in the reign of Aḥashverosh, at the beginning of his reign, they wrote libel [against the inhabitants of Judah and Jerusalem]” (Ezra 4:6). “And the end of his mouth [is evil debauchery]” – as he arose and abrogated the labor of the construction of the Temple.