Proverbs 17:12

Let a man meet a bear robbed of her cubs,

Rather than a fool in his folly.

Proverbs 23:9

Do not speak in the hearing of a fool,

For he will despise the insight of your speech.

Do not answer a fool according to his folly,

Lest you yourself also be like him.

Answer a fool according to his folly,

Lest he be wise in his own eyes.

He cuts off his own feet and drinks violence

Who sends words by the hand of a fool.

Like the legs which hang limp on the lame,

So is a proverb in the mouth of fools.

Like one who binds a stone in a sling,

So is he who gives glory to a fool.

Like a thorn which goes up into the hand of a drunkard,

So is a proverb in the mouth of fools.

Like an archer who wounds everyone,

So is he who hires a fool or who hires those who pass by.

Like a dog that returns to its vomit

Is a fool who repeats his folly.

Though you pound an ignorant fool in a mortar with a pestle in the midst of crushed grain,

His folly will not turn aside from him.

When a wise man is brought into judgment with a man who is an ignorant fool,

The ignorant fool both rages and laughs, and there is no rest.