Proverbs 15:2

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

Proverbs 12:23

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

Proverbs 13:16

Every prudent man dealeth with knowledge: but a fool layeth open his folly.

Proverbs 15:28

The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things.

Psalm 45:1

{To the chief Musician upon Shoshannim, for the sons of Korah, Maschil, A Song of loves.} My heart is inditing a good matter: I speak of the things which I have made touching the king: my tongue is the pen of a ready writer.

Psalm 59:7

Behold, they belch out with their mouth: swords are in their lips: for who, say they, doth hear?

Proverbs 15:23

A man hath joy by the answer of his mouth: and a word spoken in due season, how good is it!

Proverbs 16:23

The heart of the wise teacheth his mouth, and addeth learning to his lips.

Proverbs 25:11-12

A word fitly spoken is like apples of gold in pictures of silver.

Ecclesiastes 10:12-13

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

Isaiah 50:4

The Lord GOD hath given me the tongue of the learned, that I should know how to speak a word in season to him that is weary: he wakeneth morning by morning, he wakeneth mine ear to hear as the learned.

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 hath joy by the answer of his mouth: and a word spoken in due season, how good is it!
Proverbs 12:23
A prudent man concealeth knowledge: but the heart of fools proclaimeth foolishness.
Proverbs 13:16
Every prudent man dealeth with knowledge: but a fool layeth open his folly.
Proverbs 16:23
The heart of the wise teacheth his mouth, and addeth learning to his lips.
Proverbs 25:11
A word fitly spoken is like apples of gold in pictures of silver.
Psalm 45:1
{To the chief Musician upon Shoshannim, for the sons of Korah, Maschil, A Song of loves.} My heart is inditing a good matter: I speak of the things which I have made touching the king: my tongue is the pen of a ready writer.
Ecclesiastes 10:12
The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.
Isaiah 50:4
The Lord GOD hath given me the tongue of the learned, that I should know how to speak a word in season to him that is weary: he wakeneth morning by morning, he wakeneth mine ear to hear as the learned.

Poureth

Psalm 59:7
Behold, they belch out with their mouth: swords are in their lips: for who, say they, doth hear?

General references

Proverbs 14:33
Wisdom resteth in the heart of him that hath understanding: but that which is in the midst of fools is made known.
Proverbs 17:28
Even a fool, when he holdeth his peace, is counted wise: and he that shutteth his lips is esteemed a man of understanding.
Matthew 15:18
But those things which proceed out of the mouth come forth from the heart; and they defile the man.

King James Version Public Domain