Midrasz do Koheleta 10:13

Rabbi Ḥanina bar Ada began: [“The words of the mouth of a wise man are grace, and the lips of a fool will swallow him” (Ecclesiastes 10:12).] “The words of the mouth of a wise man are grace” – that is Cyrus, as it is stated: “So said Cyrus king of Persia: The Lord, God of the heavens, has given me all the kingdoms of the earth and He has commanded me to build Him a house in Jerusalem, which is in Judah” (Ezra 1:2). “And the lips of a fool will swallow him” – as he (Cyrus) said: “He is the God who is in Jerusalem”¹²The implication being that He is only the god of Jerusalem, which demonstrates Cyrus’ foolishness. (Ezra 1:3).
“The beginning of the words from his mouth is foolishness and the result from his mouth is evil debauchery” (Ecclesiastes 10:13). What is the foolishness? “Any of you from all His people, may his God be with him…”¹³“His God,” implying that other nations have their own gods. (Ezra 1:3). “The result from his mouth is evil debauchery,” as he decreed, saying: Whoever crossed the Euphrates, crossed; and whoever has not crossed, shall not cross.
Another matter: “The beginning of the words...” that is Aḥashverosh, as it is stated: “In the reign of Aḥashverosh, at the beginning of his reign, they wrote a libel against the residents of Judah and Jerusalem.” (Ezra 4:6). “The result from his mouth is evil debauchery,” as he went up and cancelled the work on the Temple. When everyone saw that it was so, they began screaming: ‘Woe [vai];’ “it was [vayhi] during the days of Aḥashverosh” (Esther 1:1).