Proverbs 13:3

He that keepeth his mouth, keepeth his life; but whoso speaketh unadvised, findeth harm.

Proverbs 21:23

Whoso keepeth his mouth and his tongue; the same keepeth his soul from troubles.

Proverbs 12:13

The wicked falleth into the snare through the malice of his own mouth; but the just shall escape out of peril.

Proverbs 18:7

A fool's mouth is his own destruction, and his lips are the snare for his own soul.

Proverbs 18:21

Death and life stand in the power of the tongue; he that loveth it, shall enjoy the fruit thereof.

Psalm 39:1

{To the Chanter, for praising, a Psalm of David} I said, "I will take heed to my ways, that I offend not in my tongue. I will keep my mouth as it were with a bridle, while the ungodly is in my sight."

Proverbs 10:19

Where much babbling is, there must needs be offense; he that refraineth his lips is wisest of all.

Proverbs 20:19

Meddle not with him that betrayeth secrets, and is a slanderer, and deceiveth with his lips.

Matthew 12:36-37

But I say unto you, that of every idle word, that men shall have spoken, they shall give accounts at the day of judgment.

James 1:26

If any man among you seem devout, and refrain not his tongue: but deceive his own heart, this man's devotion is in vain.

James 3:2-12

For in many things we sin all. If a man sin not in word, the same is a perfect man and able to tame all the 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
Where much babbling is, there must needs be offense; he that refraineth his lips is wisest of all.
Proverbs 12:13
The wicked falleth into the snare through the malice of his own mouth; but the just shall escape out of peril.
Proverbs 21:23
Whoso keepeth his mouth and his tongue; the same keepeth his soul from troubles.
Psalm 39:1
{To the Chanter, for praising, a Psalm of David} I said, "I will take heed to my ways, that I offend not in my tongue. I will keep my mouth as it were with a bridle, while the ungodly is in my sight."
Matthew 12:36
But I say unto you, that of every idle word, that men shall have spoken, they shall give accounts at the day of judgment.
James 1:26
If any man among you seem devout, and refrain not his tongue: but deceive his own heart, this man's devotion is in vain.
James 3:2
For in many things we sin all. If a man sin not in word, the same is a perfect man and able to tame all the body.