'Fast' in the Bible

“Why then has this people, Jerusalem,Turned away in continual apostasy?They hold fast to deceit,They refuse to return.

When they fast, I am not going to listen to their cry; and when they offer burnt offering and grain offering, I am not going to accept them. Rather I am going to make an end of them by the sword, famine and pestilence.”

So you go and read from the scroll which you have written at my dictation the words of the Lord to the people in the Lord’s house on a fast day. And also you shall read them to all the people of Judah who come from their cities.

Now in the fifth year of Jehoiakim the son of Josiah, king of Judah, in the ninth month, all the people in Jerusalem and all the people who came from the cities of Judah to Jerusalem proclaimed a fast before the Lord.

Thus says the Lord of hosts,“The sons of Israel are oppressed,And the sons of Judah as well;And all who took them captive have held them fast,They have refused to let them go.