Proverbs 12:23

A prudent man conceals knowledge: but the heart of fools proclaims foolishness.

Proverbs 13:16

Every prudent man deals with knowledge: but a fool lays open his folly.

Proverbs 15:2

The tongue of the wise uses knowledge aright: but the mouth of fools pours out foolishness.

Proverbs 11:13

A talebearer reveals secrets: but he that is of a faithful spirit conceals the matter.

Proverbs 10:14

Wise men lay up knowledge: but the mouth of the foolish is near destruction.

Proverbs 10:19

In the multitude of words there lacks not sin: but he that refrains his lips is wise.

Ecclesiastes 10:3

Yea also, when he that is a fool walks by the way, his wisdom fails him, and he says to every one that he is a fool.

Ecclesiastes 10:12-14

The words of a wise man's mouth are gracious; but the lips of a fool will swallow him up.

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 there lacks not sin: but he that refrains his lips is wise.
Proverbs 11:13
A talebearer reveals secrets: but he that is of a faithful spirit conceals the matter.
Proverbs 13:16
Every prudent man deals with knowledge: but a fool lays open his folly.

But

Proverbs 15:2
The tongue of the wise uses knowledge aright: but the mouth of fools pours out foolishness.
Ecclesiastes 10:3
Yea also, when he that is a fool walks by the way, his wisdom fails him, and he says to every one that he is a fool.

General references

Proverbs 14:33
Wisdom rests in the heart of him that has understanding: but that which is in the midst of fools is made known.
Proverbs 29:11
A fool utters all his mind: but a wise man keeps it in till afterwards.