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.

Proverbs 12:13

In the sin of the lips is a net which takes the sinner, but the upright man will come out of trouble.

Proverbs 18:7

The mouth of a foolish man is his destruction, and his lips are a net for his soul.

Proverbs 18:21

Death and life are in the power of the tongue; and those to whom it is dear will have its fruit for their food.

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.

Proverbs 10:19

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

Proverbs 20:19

He who goes about talking of the business of others gives away secrets: so have nothing to do with him whose lips are open wide.

Matthew 12:36-37

And I say to you that in the day when they are judged, men will have to give an account of every foolish word they have said.

James 1:26

If a man seems to have religion and has no control over his tongue but lets himself be tricked by what is false, this man's religion is of no value.

James 3:2-12

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.

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 there is much talk there will be no end to sin, but he who keeps his mouth shut does wisely.
Proverbs 12:13
In the sin of the lips is a net which takes the sinner, but the upright man will come out of trouble.
Proverbs 21:23
He who keeps watch over his mouth and his tongue keeps his soul from troubles.
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.
Matthew 12:36
And I say to you that in the day when they are judged, men will have to give an account of every foolish word they have said.
James 1:26
If a man seems to have religion and has no control over his tongue but lets himself be tricked by what is false, this man's religion is of no value.
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.

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