The name adopted from the Babylonians by the Jews after the Captivity for the third civil, or ninth ecclesiastical, month (Neh. 1:1; Zech. 7:1). It corresponds nearly with the moon in November.
Chisleu
Chisleu is a month, not a person or place. Nehemiah’s book opens with a date: “in the month Chisleu, in the twentieth year, as I was in Shushan the palace.” Nave’s gathers two other mentions of the ninth month here. In Ezra 10 the people sit in the street “trembling because of this matter, and for the great rain,” and in Jeremiah 36 “the king sat in the winterhouse in the ninth month,” with “a fire on the hearth burning before him.” Rain and fire suggest a cold, wet season. Nehemiah 1:1 is the verse that names it.
3 verses
Ezra
Then all the men of Judah and Benjamin gathered themselves together unto Jerusalem within three days. It was the ninth month, on the twentieth day of the month; and all the people sat in the street of the house of God, trembling because of this matter, and for the great rain.
Nehemiah
The words of Nehemiah the son of Hachaliah. And it came to pass in the month Chisleu, in the twentieth year, as I was in Shushan the palace,
Jeremiah
Now the king sat in the winterhouse in the ninth month: and there was a fire on the hearth burning before him.
From Easton's Bible Dictionary
Matthew George Easton, 1897