'Foolish' in the Bible

"Everyone who keeps on hearing these messages of mine and never puts them into practice is like a foolish man who built his house on sand.

Now five of them were foolish, and five were wise,

because when the foolish ones took their lamps, they didn't take any oil with them.

"But the foolish ones told the wise, "Give us some of your oil, because our lamps are going out!'