'Foolish' in the Bible

For my people are foolish, they know me not; they are sottish children, and they have no understanding; they are wise to do evil, but to do good they have no knowledge.

Then I said, Surely these are poor; they are foolish; for they know not the way of Jehovah, nor the law of their God:

Hear now this, O foolish people, and without understanding; that have eyes, and see not; that have ears, and hear not:

But they are together brutish and foolish: the instruction of idols! it is but a stock.