'Foolish' in the Bible

And every one that heareth these words of mine, and doeth them not, shall be likened unto a foolish man, who built his house upon the sand:

And five of them were foolish, and five were wise.

For the foolish, when they took their lamps, took no oil with them:

And the foolish said unto the wise, Give us of your oil; for our lamps are going out.