Ecclesiastes 10:3 KJV
Yea also, when he that is a fool walketh by the way, his wisdom faileth him, and he saith to every one that he is a fool.
Proverbs 13:16 KJV
Every prudent man dealeth with knowledge: but a fool layeth open his folly.
Proverbs 18:2 KJV
A fool hath no delight in understanding, but that his heart may discover itself.