Proverbs 18:2 - A fool has no delight in understanding, but only in revealing his own opinion.
Proverbs 18:6 - 7 - A fool's lips come into strife, and his mouth invites beatings. A fool's mouth is his destruction, and his lips are a snare to his soul.
Proverbs 28:26 - One who trusts in himself is a fool; but one who walks in wisdom is kept safe.
Psalms 14:1 - The fool has said in his heart, "There is no God." They are corrupt. They have done abominable works. There is no one who does good.
Ecclesiastes 4:5 - The fool folds his hands together and ruins himself.