Proverbs 10:32

The lips of the righteous shall know the will of God, but the mouth of the wicked speaks perversion.

Ecclesiastes 12:10

The preacher sought to find willing words and upright writings, even words of truth.

Proverbs 2:12

to deliver thee from the evil way, from the man that speaks perversion,

Proverbs 11:11

By the blessing of the upright the city is exalted, but it is overthrown by the mouth of the wicked.

Proverbs 12:6

The words of the wicked are to lie in wait for blood, but the mouth of the upright shall deliver them.

Proverbs 12:18

There are those that speak like the piercings of a sword, but the tongue of the wise is medicine.

Proverbs 15:2

The tongue of the wise shall adorn wisdom, but the mouth of fools shall speak foolishness.

Proverbs 15:28

The heart of the righteous studies to answer, but the mouth of the wicked pours out evil things.

Proverbs 18:6-8

A fool's lips enter into contention, and his mouth calls for strokes.

Ecclesiastes 10:12

The words from the mouth of the wise man are grace, but the lips of the fool will swallow up himself.

Daniel 4:27

Therefore, O king, approve my counsel and redeem thy sins with righteousness and thine iniquities with mercies unto the poor: behold the medicine for thy sin.

Titus 2:8

sound speech, that cannot be condemned; that the adversary may be ashamed, having no evil thing to say of you.

Treasury of Scripture Knowledge

Summary

The lips of the righteous know what is acceptable: but the mouth of the wicked speaketh frowardness.

General references

Bible References

Know

Ecclesiastes 12:10
The preacher sought to find willing words and upright writings, even words of truth.
Daniel 4:27
Therefore, O king, approve my counsel and redeem thy sins with righteousness and thine iniquities with mercies unto the poor: behold the medicine for thy sin.
Titus 2:8
sound speech, that cannot be condemned; that the adversary may be ashamed, having no evil thing to say of you.

General references

Matthew 15:18
But those things which proceed out of the mouth come forth from the heart, and they defile the man.