'Fast' in the Bible

Why hath this people of Jerusalem slidden back with a perpetual backsliding? They hold fast deceit, they refuse to return.

When they fast, I will not hear their cry; and when they offer up burnt-offering and oblation, I will not accept them: for I will consume them by sword, and by famine, and by pestilence.

and read in the roll, which thou hast written from my mouth, the words of Jehovah in the ears of the people in the house of Jehovah upon the fast day; and thou shalt also read them in the ears of all Judah that come from their cities.

And it came to pass in the fifth year of Jehoiakim the son of Josiah, the king of Judah, in the ninth month, that they proclaimed a fast before Jehovah, for all the people in Jerusalem, and for all the people that came from the cities of Judah to Jerusalem.

Declare in Egypt, and publish in Migdol, and publish in Noph, and in Tahpanhes; say, Stand fast, and prepare thee; for the sword devoureth round about thee.

The calamity of Moab is near to come, and his affliction hasteth fast.

Thus saith Jehovah of hosts: The children of Israel and the children of Judah were together oppressed; and all that took them captives held them fast: they refused to let them go.