Proverbs 10:19

Where there is much talk there will be no end to sin, but he who keeps his mouth shut does wisely.

James 3:2

For we all go wrong in a number of things. If a man never makes a slip in his talk, then he is a complete man and able to keep all his body in control.

James 1:19

You have knowledge of this, dear brothers. But let every man be quick in hearing, slow in words, slow to get angry;

Psalm 39:1

I said, I will give attention to my ways, so that my tongue may do no wrong; I will keep my mouth under control, while the sinner is before me.

Ecclesiastes 5:3

As a dream comes from much business, so the voice of a foolish man comes with words in great number.

Proverbs 17:27-28

He who has knowledge says little: and he who has a calm spirit is a man of good sense.

Ecclesiastes 10:13-14

The first words of his mouth are foolish, and the end of his talk is evil crime.

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 has knowledge says little: and he who has a calm spirit is a man of good sense.
Psalm 39:1
I said, I will give attention to my ways, so that my tongue may do no wrong; I will keep my mouth under control, while the sinner is before me.
James 1:19
You have knowledge of this, dear brothers. But let every man be quick in hearing, slow in words, slow to get angry;
James 3:2
For we all go wrong in a number of things. If a man never makes a slip in his talk, then he is a complete man and able to keep all his body in control.

General references

Proverbs 13:3
He who keeps a watch on his mouth keeps his life; but he whose lips are open wide will have destruction.
Proverbs 21:23
He who keeps watch over his mouth and his tongue keeps his soul from troubles.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain