'Foolish' in the Bible

And every one who hears these my words and does not do them, he shall be likened to a foolish man, who built his house upon the sand;

And five of them were prudent and five foolish.

They that were foolish took their torches and did not take oil with them;

And the foolish said to the prudent, Give us of your oil, for our torches are going out.