Proverbs 12:23

A prudent man, concealeth knowledge, but, the heart of dullards, proclaimeth folly.

Proverbs 13:16

Every prudent man, maketh use of knowledge, but, a dullard, spreadeth folly.

Proverbs 15:2

The tongue of the wise, adorneth knowledge, - but, the month of dullards, belcheth out folly.

Proverbs 11:13

He that goeth about talebearing, revealeth a secret, but, he that is faithful in spirit, concealeth a matter.

Proverbs 10:14

Wise men, treasure up knowledge, but, the mouth of the foolish, is a terror near at hand.

Proverbs 10:19

In the multitude of words, there wanteth not transgression, but, he that restraineth his lips, sheweth prudence.

Ecclesiastes 10:3

Yea, even by the way, as the foolish man walketh along, his sense faileth him - and he telleth everyone that, foolish, is he!

Ecclesiastes 10:12-14

The words of a wise man's mouth, are pleasant, - but, the lips of a dullard, 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 wanteth not transgression, but, he that restraineth his lips, sheweth prudence.
Proverbs 11:13
He that goeth about talebearing, revealeth a secret, but, he that is faithful in spirit, concealeth a matter.
Proverbs 13:16
Every prudent man, maketh use of knowledge, but, a dullard, spreadeth folly.

But

Proverbs 15:2
The tongue of the wise, adorneth knowledge, - but, the month of dullards, belcheth out folly.
Ecclesiastes 10:3
Yea, even by the way, as the foolish man walketh along, his sense faileth him - and he telleth everyone that, foolish, is he!

General references

Proverbs 14:33
In the heart of the intelligent, reposeth wisdom, but, in the midst of dullards, it maketh itself known.
Proverbs 29:11
All his anger, doth a dullard let go, but, a wise man, by keeping it back, stilleth it.