Proverbs 12:23

A prudent man conceals knowledge,
But the heart of fools proclaims folly.

Proverbs 13:16

Every prudent man acts with knowledge,
But a fool displays folly.

Proverbs 15:2

The tongue of the wise makes knowledge acceptable,
But the mouth of fools spouts folly.

Proverbs 11:13

He who goes about as a talebearer reveals secrets,
But he who is trustworthy conceals a matter.

Proverbs 10:14

Wise men store up knowledge,
But with the mouth of the foolish, ruin is at hand.

Proverbs 10:19

When there are many words, transgression is unavoidable,
But he who restrains his lips is wise.

Ecclesiastes 10:3

Even when the fool walks along the road, his sense is lacking and he demonstrates to everyone that he is a fool.

Ecclesiastes 10:12-14

Words from the mouth of a wise man are gracious, while the lips of a fool consume him;

Treasury of Scripture Knowledge

Summary

A prudent man concealeth knowledge: but the heart of fools proclaimeth foolishness.

General references

Bible References

A prudent

Proverbs 10:19
When there are many words, transgression is unavoidable,
But he who restrains his lips is wise.
Proverbs 11:13
He who goes about as a talebearer reveals secrets,
But he who is trustworthy conceals a matter.
Proverbs 13:16
Every prudent man acts with knowledge,
But a fool displays folly.

But

Proverbs 15:2
The tongue of the wise makes knowledge acceptable,
But the mouth of fools spouts folly.
Ecclesiastes 10:3
Even when the fool walks along the road, his sense is lacking and he demonstrates to everyone that he is a fool.

General references

Proverbs 14:33
Wisdom rests in the heart of one who has understanding,
But in the hearts of fools it is made known.
Proverbs 29:11
A fool always loses his temper,
But a wise man holds it back.