Proverbs 10:19

In the multitude of words there is no lack of disobedience, but he who restrains his lips does wisely.

James 3:2

For in many things we all stumble. If anyone does not stumble in word, the same is a perfect man, able to bridle the whole body also.

James 1:19

This you know, my beloved brothers. But let every man be swift to hear, slow to speak, and slow to anger;

Psalm 39:1

I said, "I will watch my ways, so that I do not sin with my tongue. I will keep my mouth with a bridle while the wicked is before me."

Ecclesiastes 5:3

For as a dream comes with a multitude of cares, so a fool's speech with a multitude of words.

Proverbs 17:27-28

He who spares his words has knowledge. He who is even tempered is a man of understanding.

Ecclesiastes 10:13-14

The beginning of the words of his mouth is foolishness; and the end of his talk is mischievous 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 who spares his words has knowledge. He who is even tempered is a man of understanding.
Psalm 39:1
I said, "I will watch my ways, so that I do not sin with my tongue. I will keep my mouth with a bridle while the wicked is before me."
James 1:19
This you know, my beloved brothers. But let every man be swift to hear, slow to speak, and slow to anger;
James 3:2
For in many things we all stumble. If anyone does not stumble in word, the same is a perfect man, able to bridle the whole body also.

General references

Proverbs 13:3
He who guards his mouth guards his soul. One who opens wide his lips comes to ruin.
Proverbs 21:23
Whoever guards his mouth and his tongue keeps his soul from troubles.