Proverbs 10:11

The mouth of a righteous man is a fountain of life, but violence covers the mouth of the wicked.

Blessings are upon the head of a righteous man, but violence covers the mouth of the wicked.

The law of a wise man is a fountain of life, to depart from the snares of death.

The words of a man's mouth are deep waters. The wellspring of wisdom is a flowing brook.

The mouth of a righteous man talks of wisdom, and his tongue speaks justice.

The upright shall see it, and be glad. And all iniquity shall stop her mouth.

The tongue of a righteous man is choice silver. The heart of the wicked is little worth.

The lips of a righteous man knows what is acceptable, but the mouth of the wicked [is] perverseness.

The lips of the wise disperse knowledge, but the heart of the foolish, not so.

Understanding is a well-spring of life to him who has it, but the correction of fools is folly.

There is gold, and abundance of rubies, but the lips of knowledge are a precious jewel.

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

Ye offspring of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaks.

Let no corrupt speech go out of your mouth, rather if there is any good word for edification of a need, so that it may give grace to those who hear.

So also the tongue is a little body-part, and boasts greatly. Behold a little fire, how much wood it kindles.

Treasury of Scripture Knowledge

The mouth of a righteous man is a well of life: but violence covereth the mouth of the wicked.