'Foolish' in the Bible

And Ephraim is like a foolish dove, without wisdom; they send out their cry to Egypt, they go to Assyria.

The days of punishment, the days of reward are come; Israel will be put to shame; the prophet is foolish, the man who has the spirit is off his head, because of your great sin.

Their words are foolish; they make agreements with false oaths, so punishment will come up like a poison-plant in a ploughed field.