Proverbs 12:23

A wise man conceals knowledge, but the heart of fools cries out foolishness.

Proverbs 13:16

Every wise one deals with knowledge, but a fool lays open his folly.

Proverbs 15:2

The tongue of the wise uses knowledge rightly, but the mouth of fools pours out foolishness.

Proverbs 11:13

One going with slander is a revealer of secrets, but the faithful of spirit keeps the matter hidden.

Proverbs 10:14

Wise ones store up knowledge; but the mouth of the foolish is near ruin.

Proverbs 10:19

In the multitude of words, sin is not lacking; but he who holds back his lips is wise.

Ecclesiastes 10:3

Yes also, in the way a fool walks, his heart fails; and he says to all that he is a fool.

Ecclesiastes 10:12-14

The words of a wise mouth are gracious; but the lips of a fool will swallow 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
In the multitude of words, sin is not lacking; but he who holds back his lips is wise.
Proverbs 11:13
One going with slander is a revealer of secrets, but the faithful of spirit keeps the matter hidden.
Proverbs 13:16
Every wise one deals with knowledge, but a fool lays open his folly.

But

Proverbs 15:2
The tongue of the wise uses knowledge rightly, but the mouth of fools pours out foolishness.
Ecclesiastes 10:3
Yes also, in the way a fool walks, his heart fails; and he says to all that he is a fool.

General references

Proverbs 14:33
Wisdom rests in the heart of him who has understanding, but among fools it is made known.
Proverbs 29:11
A fool speaks all his mind; but a wise one keeps it in until afterwards.