Proverbs 10:19

Transgression is at work where people talk too much, but anyone who holds his tongue is prudent.

James 3:2

For all of us make many mistakes. If someone does not make any mistakes when he speaks, he is perfect and able to control his whole body.

James 1:19

You must understand this, my dear brothers. Everyone should be quick to listen, slow to speak, and slow to get angry.

Psalm 39:1

I told myself, "I will keep watch over my tongue to keep from sinning. I will muzzle my mouth when the wicked are around."

Ecclesiastes 5:3

Too many worries lead to nightmares, and a fool is known from talking too much.

Proverbs 17:27-28

Whoever controls what he says is knowledgeable; anyone who has a calm spirit is a man of understanding.

Ecclesiastes 10:13-14

He begins his speech with foolishness, and concludes it with evil 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
Whoever controls what he says is knowledgeable; anyone who has a calm spirit is a man of understanding.
Psalm 39:1
I told myself, "I will keep watch over my tongue to keep from sinning. I will muzzle my mouth when the wicked are around."
James 1:19
You must understand this, my dear brothers. Everyone should be quick to listen, slow to speak, and slow to get angry.
James 3:2
For all of us make many mistakes. If someone does not make any mistakes when he speaks, he is perfect and able to control his whole body.

General references

Proverbs 13:3
Anyone who guards his words protects his life; anyone who talks too much is ruined.
Proverbs 21:23
Whoever watches his mouth and tongue keeps himself from trouble.

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