Proverbs 10:19

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

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.

James 1:19

Wherefore, dear brethren, let every man be swift to hear, slow to speak, and slow to wrath.

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."

Ecclesiastes 5:3

For where much carefulness is, there are many dreams: and where many words are, there men may hear fools.

Proverbs 17:27-28

He is wise and discreet that tempereth his words; and he is a man of understanding, that maketh much of his spirit.

Ecclesiastes 10:13-14

The beginning of his talking is foolishness, and the last word of his mouth is great madness.

Treasury of Scripture Knowledge

Summary

In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.

General references

Bible References

But

Proverbs 17:27
He is wise and discreet that tempereth his words; and he is a man of understanding, that maketh much of his spirit.
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."
James 1:19
Wherefore, dear brethren, let every man be swift to hear, slow to speak, and slow to wrath.
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.

General references

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.