Ecclesiastes 10:3
Even when the fool walks by the way, he lacks prudence, and he says unto every one that he is a fool.
Proverbs 13:16
Every sane man works according to wisdom: but the fool shall manifest his folly.
Proverbs 18:2
A fool has no delight in understanding, but in that which his own heart discovers.
Proverbs 18:6
A fool's lips enter into contention, and his mouth calls for strokes.
Ecclesiastes 5:3
For out of much preoccupation comes the dream, and the voice of the fool out of a multitude of words.
1 Peter 4:4
And it seems strange to those that speak evil of you, that ye do not run with them to the same unchecked dissolution;