'Foolish' in the Bible

"For my people are foolish, they don't know me. They're stupid children, they have no understanding. They're skilled at doing evil, but how to do good, they don't know."

Then I said, "These are only the poor, they're foolish, for they don't know the LORD's way, the requirement of their God.

"Hear this, you foolish and stupid people: They have eyes, but don't see; they have ears, but don't hear.