Proverbs 15:2

Knowledge is dropping from the tongue of the wise; but from the mouth of the foolish comes a stream of foolish words.

Proverbs 12:23

A sharp man keeps back his knowledge; but the heart of foolish men makes clear their foolish thoughts.

Proverbs 13:16

A sharp man does everything with knowledge, but a foolish man makes clear his foolish thoughts.

Proverbs 15:28

The heart of the upright gives thought to his answer; but from the mouth of the evil-doer comes a stream of evil things.

Psalm 45:1

My heart is flowing over with good things; my words are of that which I have made for a king; my tongue is the pen of a ready writer.

Psalm 59:7

See, hate is dropping from their lips; curses are on their tongues: they say, Who gives attention to it?

Proverbs 15:23

A man has joy in the answer of his mouth: and a word at the right time, how good it is!

Proverbs 16:23

The heart of the wise man is the teacher of his mouth, and gives increased learning to his lips.

Proverbs 25:11-12

A word at the right time is like apples of gold in a network of silver.

Ecclesiastes 10:12-13

The words of a wise man's mouth are sweet to all, but the lips of a foolish man are his destruction.

Isaiah 50:4

The Lord God has given me the tongue of those who are experienced, so that I may be able to give the word a special sense for the feeble: every morning my ear is open to his teaching, like those who are experienced:

Treasury of Scripture Knowledge

Summary

The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.

Poureth

Bible References

Tongue

Proverbs 15:23
A man has joy in the answer of his mouth: and a word at the right time, how good it is!
Proverbs 12:23
A sharp man keeps back his knowledge; but the heart of foolish men makes clear their foolish thoughts.
Proverbs 13:16
A sharp man does everything with knowledge, but a foolish man makes clear his foolish thoughts.
Proverbs 16:23
The heart of the wise man is the teacher of his mouth, and gives increased learning to his lips.
Proverbs 25:11
A word at the right time is like apples of gold in a network of silver.
Psalm 45:1
My heart is flowing over with good things; my words are of that which I have made for a king; my tongue is the pen of a ready writer.
Ecclesiastes 10:12
The words of a wise man's mouth are sweet to all, but the lips of a foolish man are his destruction.
Isaiah 50:4
The Lord God has given me the tongue of those who are experienced, so that I may be able to give the word a special sense for the feeble: every morning my ear is open to his teaching, like those who are experienced:

Poureth

Psalm 59:7
See, hate is dropping from their lips; curses are on their tongues: they say, Who gives attention to it?

General references

Proverbs 14:33
Wisdom has her resting-place in the mind of the wise, but she is not seen among the foolish.
Proverbs 17:28
Even the foolish man, when he keeps quiet, is taken to be wise: when his lips are shut he is credited with good sense.
Matthew 15:18
But the things which come out of the mouth come from the heart; and they make a man unclean.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain