Proverbs 13:3

He who keeps his mouth (watches what he says) keeps his life. He who opens wide his lips (speaks thoughtlessly) will have destruction.

Proverbs 21:23

He who guards his mouth and holds his tongue stays out of trouble.

Proverbs 12:13

The wicked is snared by the transgression of his lips. The righteous will depart from trouble.

Proverbs 18:7

A fool's mouth is his ruin. His lips are the snares of his life.

Proverbs 18:21

Death and life are in the power of the tongue. Those who love it will eat the fruit.

Psalm 39:1

([Psalm of David]) I said: I will guard my ways that I may not sin with my tongue. I will guard my mouth as with a muzzle while the wicked are in my presence.

Proverbs 10:19

Sin does not hide from a multitude of words. The wise controls his lips.

Proverbs 20:19

A gossip reveals secrets. So avoid a man who speaks flattering words.

Matthew 12:36-37

I tell you there will be an account in the Judgment Day for every careless word that men say.

James 1:26

If any man thinks he is religious, while he does not control his tongue but deceives his heart, this man's religion is vain (worthless) (useless).

James 3:2-12

We all stumble in many things. If any do not stumble in word, he is a perfect man, able to restrain (control) the whole body.

Treasury of Scripture Knowledge

Summary

He that keepeth his mouth keepeth his life: but he that openeth wide his lips shall have destruction.

Bible References

General references

Proverbs 10:19
Sin does not hide from a multitude of words. The wise controls his lips.
Proverbs 12:13
The wicked is snared by the transgression of his lips. The righteous will depart from trouble.
Proverbs 21:23
He who guards his mouth and holds his tongue stays out of trouble.
Psalm 39:1
([Psalm of David]) I said: I will guard my ways that I may not sin with my tongue. I will guard my mouth as with a muzzle while the wicked are in my presence.
Matthew 12:36
I tell you there will be an account in the Judgment Day for every careless word that men say.
James 1:26
If any man thinks he is religious, while he does not control his tongue but deceives his heart, this man's religion is vain (worthless) (useless).
James 3:2
We all stumble in many things. If any do not stumble in word, he is a perfect man, able to restrain (control) the whole body.